diff --git a/sox/transform.py b/sox/transform.py
index af48b40..54e1ccd 100644
--- a/sox/transform.py
+++ b/sox/transform.py
@@ -234,7 +234,7 @@ class Transformer(object):
             input_format.extend(['-t', '{}'.format(file_type)])
 
         if rate is not None:
-            input_format.extend(['-r', '{}'.format(rate)])
+            input_format.extend(['-r', '{:f}'.format(rate)])
 
         if bits is not None:
             input_format.extend(['-b', '{}'.format(bits)])
@@ -358,7 +358,7 @@ class Transformer(object):
             output_format.extend(['-t', '{}'.format(file_type)])
 
         if rate is not None:
-            output_format.extend(['-r', '{}'.format(rate)])
+            output_format.extend(['-r', '{:f}'.format(rate)])
 
         if bits is not None:
             output_format.extend(['-b', '{}'.format(bits)])
@@ -458,7 +458,7 @@ class Transformer(object):
             raise ValueError("width_q must be a positive number.")
 
         effect_args = [
-            'allpass', '{}'.format(frequency), '{}q'.format(width_q)
+            'allpass', '{:f}'.format(frequency), '{:f}q'.format(width_q)
         ]
 
         self.effects.extend(effect_args)
@@ -500,7 +500,7 @@ class Transformer(object):
         if constant_skirt:
             effect_args.append('-c')
 
-        effect_args.extend(['{}'.format(frequency), '{}q'.format(width_q)])
+        effect_args.extend(['{:f}'.format(frequency), '{:f}q'.format(width_q)])
 
         self.effects.extend(effect_args)
         self.effects_log.append('bandpass')
@@ -534,7 +534,7 @@ class Transformer(object):
             raise ValueError("width_q must be a positive number.")
 
         effect_args = [
-            'bandreject', '{}'.format(frequency), '{}q'.format(width_q)
+            'bandreject', '{:f}'.format(frequency), '{:f}q'.format(width_q)
         ]
 
         self.effects.extend(effect_args)
@@ -575,8 +575,8 @@ class Transformer(object):
             raise ValueError("width_q must be a positive number.")
 
         effect_args = [
-            'bass', '{}'.format(gain_db), '{}'.format(frequency),
-            '{}s'.format(slope)
+            'bass', '{:f}'.format(gain_db), '{:f}'.format(frequency),
+            '{:f}s'.format(slope)
         ]
 
         self.effects.extend(effect_args)
@@ -669,7 +669,7 @@ class Transformer(object):
             t_start = round(start_times[i] - last, 2)
             t_end = round(end_times[i] - start_times[i], 2)
             effect_args.append(
-                '{},{},{}'.format(t_start, cents[i], t_end)
+                '{:f},{:f},{:f}'.format(t_start, cents[i], t_end)
             )
             last = end_times[i]
 
@@ -677,7 +677,6 @@ class Transformer(object):
         self.effects_log.append('bend')
         return self
 
-
     def biquad(self, b, a):
         '''Apply a biquad IIR filter with the given coefficients.
 
@@ -712,8 +711,9 @@ class Transformer(object):
             raise ValueError('all elements of a must be numbers.')
 
         effect_args = [
-            'biquad', '{}'.format(b[0]), '{}'.format(b[1]), '{}'.format(b[2]),
-            '{}'.format(a[0]), '{}'.format(a[1]), '{}'.format(a[2])
+            'biquad', '{:f}'.format(b[0]), '{:f}'.format(b[1]),
+            '{:f}'.format(b[2]), '{:f}'.format(a[0]),
+            '{:f}'.format(a[1]), '{:f}'.format(a[2])
         ]
 
         self.effects.extend(effect_args)
@@ -860,10 +860,10 @@ class Transformer(object):
 
         for i in range(n_voices):
             effect_args.extend([
-                '{}'.format(delays[i]),
-                '{}'.format(decays[i]),
-                '{}'.format(speeds[i]),
-                '{}'.format(depths[i]),
+                '{:f}'.format(delays[i]),
+                '{:f}'.format(decays[i]),
+                '{:f}'.format(speeds[i]),
+                '{:f}'.format(depths[i]),
                 '-{}'.format(shapes[i])
             ])
 
@@ -935,17 +935,17 @@ class Transformer(object):
         transfer_list = []
         for point in tf_points:
             transfer_list.extend([
-                "{}".format(point[0]), "{}".format(point[1])
+                "{:f}".format(point[0]), "{:f}".format(point[1])
             ])
 
         effect_args = [
             'compand',
-            "{},{}".format(attack_time, decay_time)
+            "{:f},{:f}".format(attack_time, decay_time)
         ]
 
         if soft_knee_db is not None:
             effect_args.append(
-                "{}:{}".format(soft_knee_db, ",".join(transfer_list))
+                "{:f}:{}".format(soft_knee_db, ",".join(transfer_list))
             )
         else:
             effect_args.append(",".join(transfer_list))
@@ -971,7 +971,7 @@ class Transformer(object):
         if not is_number(amount) or amount < 0 or amount > 100:
             raise ValueError('amount must be a number between 0 and 100.')
 
-        effect_args = ['contrast', '{}'.format(amount)]
+        effect_args = ['contrast', '{:f}'.format(amount)]
 
         self.effects.extend(effect_args)
         self.effects_log.append('contrast')
@@ -1029,7 +1029,7 @@ class Transformer(object):
         if not is_number(shift) or shift < -2 or shift > 2:
             raise ValueError('shift must be a number between -2 and 2.')
 
-        effect_args = ['dcshift', '{}'.format(shift)]
+        effect_args = ['dcshift', '{:f}'.format(shift)]
 
         self.effects.extend(effect_args)
         self.effects_log.append('dcshift')
@@ -1079,7 +1079,7 @@ class Transformer(object):
             raise ValueError("positions must be positive nubmers")
 
         effect_args = ['delay']
-        effect_args.extend(['{}'.format(p) for p in positions])
+        effect_args.extend(['{:f}'.format(p) for p in positions])
 
         self.effects.extend(effect_args)
         self.effects_log.append('delay')
@@ -1188,7 +1188,7 @@ class Transformer(object):
                 "the elements of decays must be between 0 and 1"
             )
 
-        effect_args = ['echo', '{}'.format(gain_in), '{}'.format(gain_out)]
+        effect_args = ['echo', '{:f}'.format(gain_in), '{:f}'.format(gain_out)]
 
         for i in range(n_echos):
             effect_args.extend([
@@ -1257,12 +1257,14 @@ class Transformer(object):
                 "the elements of decays must be between 0 and 1"
             )
 
-        effect_args = ['echos', '{}'.format(gain_in), '{}'.format(gain_out)]
+        effect_args = [
+            'echos', '{:f}'.format(gain_in), '{:f}'.format(gain_out)
+        ]
 
         for i in range(n_echos):
             effect_args.extend([
-                '{}'.format(delays[i]),
-                '{}'.format(decays[i])
+                '{:f}'.format(delays[i]),
+                '{:f}'.format(decays[i])
             ])
 
         self.effects.extend(effect_args)
@@ -1299,9 +1301,9 @@ class Transformer(object):
 
         effect_args = [
             'equalizer',
-            '{}'.format(frequency),
-            '{}q'.format(width_q),
-            '{}'.format(gain_db)
+            '{:f}'.format(frequency),
+            '{:f}q'.format(width_q),
+            '{:f}'.format(gain_db)
         ]
         self.effects.extend(effect_args)
         self.effects_log.append('equalizer')
@@ -1346,13 +1348,13 @@ class Transformer(object):
 
         if fade_in_len > 0:
             effect_args.extend([
-                'fade', str(fade_shape), str(fade_in_len)
+                'fade', '{}'.format(fade_shape), '{:f}'.format(fade_in_len)
             ])
 
         if fade_out_len > 0:
             effect_args.extend([
-                'reverse', 'fade', str(fade_shape),
-                str(fade_out_len), 'reverse'
+                'reverse', 'fade', '{}'.format(fade_shape),
+                '{:f}'.format(fade_out_len), 'reverse'
             ])
 
         if len(effect_args) > 0:
@@ -1377,7 +1379,7 @@ class Transformer(object):
             raise ValueError("coefficients must be numbers.")
 
         effect_args = ['fir']
-        effect_args.extend(['{}'.format(c) for c in coefficients])
+        effect_args.extend(['{:f}'.format(c) for c in coefficients])
 
         self.effects.extend(effect_args)
         self.effects_log.append('fir')
@@ -1431,13 +1433,13 @@ class Transformer(object):
 
         effect_args = [
             'flanger',
-            '{}'.format(delay),
-            '{}'.format(depth),
-            '{}'.format(regen),
-            '{}'.format(width),
-            '{}'.format(speed),
+            '{:f}'.format(delay),
+            '{:f}'.format(depth),
+            '{:f}'.format(regen),
+            '{:f}'.format(width),
+            '{:f}'.format(speed),
             '{}'.format(shape),
-            '{}'.format(phase),
+            '{:f}'.format(phase),
             '{}'.format(interp)
         ]
 
@@ -1500,7 +1502,7 @@ class Transformer(object):
         if limiter:
             effect_args.append('-l')
 
-        effect_args.append('{}'.format(gain_db))
+        effect_args.append('{:f}'.format(gain_db))
         self.effects.extend(effect_args)
         self.effects_log.append('gain')
 
@@ -1536,11 +1538,11 @@ class Transformer(object):
             raise ValueError("n_poles must be 1 or 2.")
 
         effect_args = [
-            'highpass', '-{}'.format(n_poles), '{}'.format(frequency)
+            'highpass', '-{}'.format(n_poles), '{:f}'.format(frequency)
         ]
 
         if n_poles == 2:
-            effect_args.append('{}q'.format(width_q))
+            effect_args.append('{:f}q'.format(width_q))
 
         self.effects.extend(effect_args)
         self.effects_log.append('highpass')
@@ -1577,11 +1579,11 @@ class Transformer(object):
             raise ValueError("n_poles must be 1 or 2.")
 
         effect_args = [
-            'lowpass', '-{}'.format(n_poles), '{}'.format(frequency)
+            'lowpass', '-{}'.format(n_poles), '{:f}'.format(frequency)
         ]
 
         if n_poles == 2:
-            effect_args.append('{}q'.format(width_q))
+            effect_args.append('{:f}q'.format(width_q))
 
         self.effects.extend(effect_args)
         self.effects_log.append('lowpass')
@@ -1650,8 +1652,8 @@ class Transformer(object):
 
         effect_args = [
             'loudness',
-            '{}'.format(gain_db),
-            '{}'.format(reference_level)
+            '{:f}'.format(gain_db),
+            '{:f}'.format(reference_level)
         ]
         self.effects.extend(effect_args)
         self.effects_log.append('loudness')
@@ -1789,9 +1791,9 @@ class Transformer(object):
         for i in range(n_bands):
 
             if i > 0:
-                effect_args.append('{}'.format(crossover_frequencies[i - 1]))
+                effect_args.append('{:f}'.format(crossover_frequencies[i - 1]))
 
-            intermed_args = ["{},{}".format(attack_time[i], decay_time[i])]
+            intermed_args = ["{:f},{:f}".format(attack_time[i], decay_time[i])]
 
             tf_points_band = tf_points[i]
             tf_points_band = sorted(
@@ -1801,18 +1803,18 @@ class Transformer(object):
             transfer_list = []
             for point in tf_points_band:
                 transfer_list.extend([
-                    "{}".format(point[0]), "{}".format(point[1])
+                    "{:f}".format(point[0]), "{:f}".format(point[1])
                 ])
 
             if soft_knee_db[i] is not None:
                 intermed_args.append(
-                    "{}:{}".format(soft_knee_db[i], ",".join(transfer_list))
+                    "{:f}:{}".format(soft_knee_db[i], ",".join(transfer_list))
                 )
             else:
                 intermed_args.append(",".join(transfer_list))
 
             if gain[i] is not None:
-                intermed_args.append("{}".format(gain[i]))
+                intermed_args.append("{:f}".format(gain[i]))
 
             effect_args.append('"{}"'.format(' '.join(intermed_args)))
 
@@ -1839,7 +1841,7 @@ class Transformer(object):
 
         effect_args = [
             'norm',
-            '{}'.format(db_level)
+            '{:f}'.format(db_level)
         ]
         self.effects.extend(effect_args)
         self.effects_log.append('norm')
@@ -1878,8 +1880,8 @@ class Transformer(object):
 
         effect_args = [
             'overdrive',
-            '{}'.format(gain_db),
-            '{}'.format(colour)
+            '{:f}'.format(gain_db),
+            '{:f}'.format(colour)
         ]
         self.effects.extend(effect_args)
         self.effects_log.append('overdrive')
@@ -1910,8 +1912,8 @@ class Transformer(object):
 
         effect_args = [
             'pad',
-            '{}'.format(start_duration),
-            '{}'.format(end_duration)
+            '{:f}'.format(start_duration),
+            '{:f}'.format(end_duration)
         ]
         self.effects.extend(effect_args)
         self.effects_log.append('pad')
@@ -1963,11 +1965,11 @@ class Transformer(object):
 
         effect_args = [
             'phaser',
-            '{}'.format(gain_in),
-            '{}'.format(gain_out),
-            '{}'.format(delay),
-            '{}'.format(decay),
-            '{}'.format(speed)
+            '{:f}'.format(gain_in),
+            '{:f}'.format(gain_out),
+            '{:f}'.format(delay),
+            '{:f}'.format(decay),
+            '{:f}'.format(speed)
         ]
 
         if modulation_shape == 'sinusoidal':
@@ -2017,7 +2019,7 @@ class Transformer(object):
         if quick:
             effect_args.append('-q')
 
-        effect_args.append('{}'.format(n_semitones * 100.))
+        effect_args.append('{:f}'.format(n_semitones * 100.))
 
         self.effects.extend(effect_args)
         self.effects_log.append('pitch')
@@ -2039,14 +2041,6 @@ class Transformer(object):
              * m : Medium,
              * h : High (default),
              * v : Very high
-        silence_threshold : float
-            Silence threshold as percentage of maximum sample amplitude.
-        min_silence_duration : float
-            The minimum ammount of time in seconds required for a region to be
-            considered non-silent.
-        buffer_around_silence : bool
-            If True, leaves a buffer of min_silence_duration around removed
-            silent regions.
 
         See Also
         --------
@@ -2065,7 +2059,7 @@ class Transformer(object):
         effect_args = [
             'rate',
             '-{}'.format(quality),
-            '{}'.format(samplerate)
+            '{:f}'.format(samplerate)
         ]
         self.effects.extend(effect_args)
         self.effects_log.append('rate')
@@ -2229,12 +2223,12 @@ class Transformer(object):
             effect_args.append('-w')
 
         effect_args.extend([
-            '{}'.format(reverberance),
-            '{}'.format(high_freq_damping),
-            '{}'.format(room_scale),
-            '{}'.format(stereo_depth),
-            '{}'.format(pre_delay),
-            '{}'.format(wet_gain)
+            '{:f}'.format(reverberance),
+            '{:f}'.format(high_freq_damping),
+            '{:f}'.format(room_scale),
+            '{:f}'.format(stereo_depth),
+            '{:f}'.format(pre_delay),
+            '{:f}'.format(wet_gain)
         ])
 
         self.effects.extend(effect_args)
@@ -2309,15 +2303,15 @@ class Transformer(object):
 
         effect_args.extend([
             '1',
-            '{}'.format(min_silence_duration),
-            '{}%'.format(silence_threshold)
+            '{:f}'.format(min_silence_duration),
+            '{:f}%'.format(silence_threshold)
         ])
 
         if location == 0:
             effect_args.extend([
                 '-1',
-                '{}'.format(min_silence_duration),
-                '{}%'.format(silence_threshold)
+                '{:f}'.format(min_silence_duration),
+                '{:f}%'.format(silence_threshold)
             ])
 
         if location == -1:
@@ -2436,32 +2430,36 @@ class Transformer(object):
             raise ValueError("phase response must be between 0 and 100")
 
         effect_args = ['sinc']
-        effect_args.extend(['-a', '{}'.format(stop_band_attenuation)])
+        effect_args.extend(['-a', '{:f}'.format(stop_band_attenuation)])
 
         if phase_response is not None:
-            effect_args.extend(['-p', '{}'.format(phase_response)])
+            effect_args.extend(['-p', '{:f}'.format(phase_response)])
 
         if filter_type == 'high':
             if transition_bw is not None:
-                effect_args.extend(['-t', '{}'.format(transition_bw)])
-            effect_args.append('{}'.format(cutoff_freq))
+                effect_args.extend(['-t', '{:f}'.format(transition_bw)])
+            effect_args.append('{:f}'.format(cutoff_freq))
         elif filter_type == 'low':
-            effect_args.append('-{}'.format(cutoff_freq))
+            effect_args.append('-{:f}'.format(cutoff_freq))
             if transition_bw is not None:
-                effect_args.extend(['-t', '{}'.format(transition_bw)])
+                effect_args.extend(['-t', '{:f}'.format(transition_bw)])
         else:
             if is_number(transition_bw):
-                effect_args.extend(['-t', '{}'.format(transition_bw)])
+                effect_args.extend(['-t', '{:f}'.format(transition_bw)])
             elif isinstance(transition_bw, list):
-                effect_args.extend(['-t', '{}'.format(transition_bw[0])])
+                effect_args.extend(['-t', '{:f}'.format(transition_bw[0])])
 
         if filter_type == 'pass':
-            effect_args.append('{}-{}'.format(cutoff_freq[0], cutoff_freq[1]))
+            effect_args.append(
+                '{:f}-{:f}'.format(cutoff_freq[0], cutoff_freq[1])
+            )
         elif filter_type == 'reject':
-            effect_args.append('{}-{}'.format(cutoff_freq[1], cutoff_freq[0]))
+            effect_args.append(
+                '{:f}-{:f}'.format(cutoff_freq[1], cutoff_freq[0])
+            )
 
         if isinstance(transition_bw, list):
-            effect_args.extend(['-t', '{}'.format(transition_bw[1])])
+            effect_args.extend(['-t', '{:f}'.format(transition_bw[1])])
 
         self.effects.extend(effect_args)
         self.effects_log.append('sinc')
@@ -2497,7 +2495,7 @@ class Transformer(object):
                 "Using an extreme factor. Quality of results will be poor"
             )
 
-        effect_args = ['speed', '{}'.format(factor)]
+        effect_args = ['speed', '{:f}'.format(factor)]
 
         self.effects.extend(effect_args)
         self.effects_log.append('speed')
@@ -2564,7 +2562,7 @@ class Transformer(object):
                 "window must be a positive number."
             )
 
-        effect_args = ['stretch', '{}'.format(factor), '{}'.format(window)]
+        effect_args = ['stretch', '{:f}'.format(factor), '{:f}'.format(window)]
 
         self.effects.extend(effect_args)
         self.effects_log.append('stretch')
@@ -2628,7 +2626,7 @@ class Transformer(object):
         if audio_type is not None:
             effect_args.append('-{}'.format(audio_type))
 
-        effect_args.append('{}'.format(factor))
+        effect_args.append('{:f}'.format(factor))
 
         self.effects.extend(effect_args)
         self.effects_log.append('tempo')
@@ -2669,8 +2667,8 @@ class Transformer(object):
             raise ValueError("width_q must be a positive number.")
 
         effect_args = [
-            'treble', '{}'.format(gain_db), '{}'.format(frequency),
-            '{}s'.format(slope)
+            'treble', '{:f}'.format(gain_db), '{:f}'.format(frequency),
+            '{:f}s'.format(slope)
         ]
 
         self.effects.extend(effect_args)
@@ -2709,8 +2707,8 @@ class Transformer(object):
 
         effect_args = [
             'tremolo',
-            '{}'.format(speed),
-            '{}'.format(depth)
+            '{:f}'.format(speed),
+            '{:f}'.format(depth)
         ]
 
         self.effects.extend(effect_args)
@@ -2738,8 +2736,8 @@ class Transformer(object):
 
         effect_args = [
             'trim',
-            '{}'.format(start_time),
-            '{}'.format(end_time - start_time)
+            '{:f}'.format(start_time),
+            '{:f}'.format(end_time - start_time)
         ]
 
         self.effects.extend(effect_args)
@@ -2851,11 +2849,11 @@ class Transformer(object):
 
         effect_args.extend([
             'vad',
-            '-t', '{}'.format(activity_threshold),
-            '-T', '{}'.format(min_activity_duration),
-            '-s', '{}'.format(initial_search_buffer),
-            '-g', '{}'.format(max_gap),
-            '-p', '{}'.format(initial_pad)
+            '-t', '{:f}'.format(activity_threshold),
+            '-T', '{:f}'.format(min_activity_duration),
+            '-s', '{:f}'.format(initial_search_buffer),
+            '-g', '{:f}'.format(max_gap),
+            '-p', '{:f}'.format(initial_pad)
         ])
 
         if location == -1:
diff --git a/sox/version.py b/sox/version.py
index de43582..4dbfbf3 100644
--- a/sox/version.py
+++ b/sox/version.py
@@ -3,4 +3,4 @@
 """Version info"""
 
 short_version = '1.2'
-version = '1.2.5'
+version = '1.2.6'

SoX doesn't seem to like scientific notation
Pysox needs to format its floats to not be scientific notation when formatting arguments for SoX, otherwise SoX seems to choke. I received 

``
SoxError: Stdout: 
Stderr: sox FAIL pad: usage: {length[@position]}
``

when pysox was calling SoX with these arguments:

``['sox', '-D', '-V2', u'../data/raw/scaper_audio/siren_wailing/5_siren_police.wav', '-c', '1', '/var/folders/xv/6nccdc7151j71bhvzlrvjhqm0000gp/T/tmpYCzbyz.wav', 'rate', '-h', '44100', 'trim', '0', '6.501565999', 'fade', 'q', '0.01', 'reverse', 'fade', 'q', '0.01', 'reverse', 'norm', '-7.36679718537', 'pad', '3.498434', '1.00000008274e-09']``

Note the `'1.00000008274e-09'` at the end. When this number was changed to `'0.00000000100000008274'`, this error went away, and when changed to a different sci notation number, e.g. `'1.0e-3'`, the problem persisted.
diff --git a/tests/test_transform.py b/tests/test_transform.py
index 2c4f3d8..8d4ae6e 100644
--- a/tests/test_transform.py
+++ b/tests/test_transform.py
@@ -165,7 +165,17 @@ class TestTransformSetInputFormat(unittest.TestCase):
     def test_rate(self):
         self.tfm.set_input_format(rate=44100)
         actual = self.tfm.input_format
-        expected = ['-r', '44100']
+        expected = ['-r', '44100.000000']
+        self.assertEqual(expected, actual)
+
+        actual_result = self.tfm.build(INPUT_FILE, OUTPUT_FILE)
+        expected_result = True
+        self.assertEqual(expected_result, actual_result)
+
+    def test_rate_scinotation(self):
+        self.tfm.set_input_format(rate=1.0e3)
+        actual = self.tfm.input_format
+        expected = ['-r', '1000.000000']
         self.assertEqual(expected, actual)
 
         actual_result = self.tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -276,7 +286,17 @@ class TestTransformSetOutputFormat(unittest.TestCase):
     def test_rate(self):
         self.tfm.set_output_format(rate=44100)
         actual = self.tfm.output_format
-        expected = ['-r', '44100']
+        expected = ['-r', '44100.000000']
+        self.assertEqual(expected, actual)
+
+        actual_result = self.tfm.build(INPUT_FILE, OUTPUT_FILE)
+        expected_result = True
+        self.assertEqual(expected_result, actual_result)
+
+    def test_rate_scinotation(self):
+        self.tfm.set_output_format(rate=1.0e3)
+        actual = self.tfm.output_format
+        expected = ['-r', '1000.000000']
         self.assertEqual(expected, actual)
 
         actual_result = self.tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -411,10 +431,10 @@ class TestTransformerAllpass(unittest.TestCase):
 
     def test_default(self):
         tfm = new_transformer()
-        tfm.allpass(500.0)
+        tfm.allpass(500)
 
         actual_args = tfm.effects
-        expected_args = ['allpass', '500.0', '2.0q']
+        expected_args = ['allpass', '500.000000', '2.000000q']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -443,7 +463,7 @@ class TestTransformerBandpass(unittest.TestCase):
         tfm.bandpass(500.0)
 
         actual_args = tfm.effects
-        expected_args = ['bandpass', '500.0', '2.0q']
+        expected_args = ['bandpass', '500.000000', '2.000000q']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -459,7 +479,7 @@ class TestTransformerBandpass(unittest.TestCase):
         tfm.bandpass(500.0, constant_skirt=True)
 
         actual_args = tfm.effects
-        expected_args = ['bandpass', '-c', '500.0', '2.0q']
+        expected_args = ['bandpass', '-c', '500.000000', '2.000000q']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -493,7 +513,7 @@ class TestTransformerBandreject(unittest.TestCase):
         tfm.bandreject(500.0)
 
         actual_args = tfm.effects
-        expected_args = ['bandreject', '500.0', '2.0q']
+        expected_args = ['bandreject', '500.000000', '2.000000q']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -522,7 +542,7 @@ class TestTransformerBass(unittest.TestCase):
         tfm.bass(-20.0)
 
         actual_args = tfm.effects
-        expected_args = ['bass', '-20.0', '100.0', '0.5s']
+        expected_args = ['bass', '-20.000000', '100.000000', '0.500000s']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -561,9 +581,9 @@ class TestTransformerBend(unittest.TestCase):
             'bend',
             '-f', '25',
             '-o', '16',
-            '0.35,180,0.25',
-            '0.15,740,0.53',
-            '0.0,-540,0.3'
+            '0.350000,180.000000,0.250000',
+            '0.150000,740.000000,0.530000',
+            '0.000000,-540.000000,0.300000'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -670,9 +690,9 @@ class TestTransformerBend(unittest.TestCase):
             'bend',
             '-f', '50',
             '-o', '16',
-            '0.35,180,0.25',
-            '0.15,740,0.53',
-            '0.0,-540,0.3'
+            '0.350000,180.000000,0.250000',
+            '0.150000,740.000000,0.530000',
+            '0.000000,-540.000000,0.300000'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -698,9 +718,9 @@ class TestTransformerBend(unittest.TestCase):
             'bend',
             '-f', '25',
             '-o', '31',
-            '0.35,180,0.25',
-            '0.15,740,0.53',
-            '0.0,-540,0.3'
+            '0.350000,180.000000,0.250000',
+            '0.150000,740.000000,0.530000',
+            '0.000000,-540.000000,0.300000'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -723,7 +743,10 @@ class TestTransformerBiquad(unittest.TestCase):
         tfm.biquad([0, 0, 0], [1, 0, 0])
 
         actual_args = tfm.effects
-        expected_args = ['biquad', '0', '0', '0', '1', '0', '0']
+        expected_args = [
+            'biquad', '0.000000', '0.000000', '0.000000',
+            '1.000000', '0.000000', '0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -828,7 +851,8 @@ class TestTransformerChorus(unittest.TestCase):
         # check only the first 3 args - the rest are randomized
         actual_args = tfm.effects
         expected_args = [
-            'chorus', '0.5', '0.9', '50.0', '0.32', '0.25', '2.0', '-t'
+            'chorus', '0.5', '0.9', '50.000000',
+            '0.320000', '0.250000', '2.000000', '-t'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -938,7 +962,7 @@ class TestTransformerContrast(unittest.TestCase):
         tfm.contrast()
 
         actual_args = tfm.effects
-        expected_args = ['contrast', '75']
+        expected_args = ['contrast', '75.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -972,7 +996,11 @@ class TestTransformerCompand(unittest.TestCase):
         tfm.compand()
 
         actual_args = tfm.effects
-        expected_args = ['compand', '0.3,0.8', '6.0:-70,-70,-60,-20,0,0']
+        expected_args = [
+            'compand', '0.300000,0.800000',
+            '6.000000:-70.000000,-70.000000,-60.000000,' +
+            '-20.000000,0.000000,0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -988,7 +1016,11 @@ class TestTransformerCompand(unittest.TestCase):
         tfm.compand(attack_time=0.5)
 
         actual_args = tfm.effects
-        expected_args = ['compand', '0.5,0.8', '6.0:-70,-70,-60,-20,0,0']
+        expected_args = [
+            'compand', '0.500000,0.800000',
+            '6.000000:-70.000000,-70.000000,-60.000000,' +
+            '-20.000000,0.000000,0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1010,7 +1042,11 @@ class TestTransformerCompand(unittest.TestCase):
         tfm.compand(decay_time=0.5)
 
         actual_args = tfm.effects
-        expected_args = ['compand', '0.3,0.5', '6.0:-70,-70,-60,-20,0,0']
+        expected_args = [
+            'compand', '0.300000,0.500000',
+            '6.000000:-70.000000,-70.000000,-60.000000,' +
+            '-20.000000,0.000000,0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1032,7 +1068,10 @@ class TestTransformerCompand(unittest.TestCase):
         tfm.compand(attack_time=1.0, decay_time=0.5)
 
         actual_args = tfm.effects
-        expected_args = ['compand', '1.0,0.5', '6.0:-70,-70,-60,-20,0,0']
+        expected_args = [
+            'compand', '1.000000,0.500000',
+            '6.000000:-70.000000,-70.000000,-60.000000,' +
+            '-20.000000,0.000000,0.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1044,7 +1083,11 @@ class TestTransformerCompand(unittest.TestCase):
         tfm.compand(soft_knee_db=-2)
 
         actual_args = tfm.effects
-        expected_args = ['compand', '0.3,0.8', '-2:-70,-70,-60,-20,0,0']
+        expected_args = [
+            'compand', '0.300000,0.800000',
+            '-2.000000:-70.000000,-70.000000,-60.000000,' +
+            '-20.000000,0.000000,0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1056,7 +1099,10 @@ class TestTransformerCompand(unittest.TestCase):
         tfm.compand(soft_knee_db=None)
 
         actual_args = tfm.effects
-        expected_args = ['compand', '0.3,0.8', '-70,-70,-60,-20,0,0']
+        expected_args = [
+            'compand', '0.300000,0.800000',
+            '-70.000000,-70.000000,-60.000000,-20.000000,0.000000,0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1074,7 +1120,9 @@ class TestTransformerCompand(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'compand', '0.3,0.8', '6.0:-70,-60,-60,-20,-40,-40,0,-4'
+            'compand', '0.300000,0.800000',
+            '6.000000:-70.000000,-60.000000,-60.000000,-20.000000,' +
+            '-40.000000,-40.000000,0.000000,-4.000000'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -1142,7 +1190,7 @@ class TestTransformerConvert(unittest.TestCase):
         tfm.convert(samplerate=8000)
 
         actual_args = tfm.effects
-        expected_args = ['rate', '-h', '8000']
+        expected_args = ['rate', '-h', '8000.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -1205,7 +1253,7 @@ class TestTransformerDcshift(unittest.TestCase):
         tfm.dcshift()
 
         actual_args = tfm.effects
-        expected_args = ['dcshift', '0.0']
+        expected_args = ['dcshift', '0.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -1258,7 +1306,7 @@ class TestTransformerDelay(unittest.TestCase):
         tfm.delay([1.0])
 
         actual_args = tfm.effects
-        expected_args = ['delay', '1.0']
+        expected_args = ['delay', '1.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -1274,7 +1322,7 @@ class TestTransformerDelay(unittest.TestCase):
         tfm.delay([0.0, 1.0])
 
         actual_args = tfm.effects
-        expected_args = ['delay', '0.0', '1.0']
+        expected_args = ['delay', '0.000000', '1.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -1358,7 +1406,7 @@ class TestTransformerEcho(unittest.TestCase):
         tfm.echo()
 
         actual_args = tfm.effects
-        expected_args = ['echo', '0.8', '0.9', '60', '0.4']
+        expected_args = ['echo', '0.800000', '0.900000', '60', '0.4']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -1374,7 +1422,7 @@ class TestTransformerEcho(unittest.TestCase):
         tfm.echo(gain_in=1.0)
 
         actual_args = tfm.effects
-        expected_args = ['echo', '1.0', '0.9', '60', '0.4']
+        expected_args = ['echo', '1.000000', '0.900000', '60', '0.4']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1391,7 +1439,7 @@ class TestTransformerEcho(unittest.TestCase):
         tfm.echo(gain_out=1.0)
 
         actual_args = tfm.effects
-        expected_args = ['echo', '0.8', '1.0', '60', '0.4']
+        expected_args = ['echo', '0.800000', '1.000000', '60', '0.4']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1408,7 +1456,9 @@ class TestTransformerEcho(unittest.TestCase):
         tfm.echo(n_echos=2, delays=[60, 60], decays=[0.4, 0.4])
 
         actual_args = tfm.effects
-        expected_args = ['echo', '0.8', '0.9', '60', '0.4', '60', '0.4']
+        expected_args = [
+            'echo', '0.800000', '0.900000', '60', '0.4', '60', '0.4'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1425,7 +1475,9 @@ class TestTransformerEcho(unittest.TestCase):
         tfm.echo(n_echos=2, delays=[1, 600], decays=[0.4, 0.4])
 
         actual_args = tfm.effects
-        expected_args = ['echo', '0.8', '0.9', '1', '0.4', '600', '0.4']
+        expected_args = [
+            'echo', '0.800000', '0.900000', '1', '0.4', '600', '0.4'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1452,7 +1504,9 @@ class TestTransformerEcho(unittest.TestCase):
         tfm.echo(n_echos=2, delays=[60, 60], decays=[0.1, 1.0])
 
         actual_args = tfm.effects
-        expected_args = ['echo', '0.8', '0.9', '60', '0.1', '60', '1.0']
+        expected_args = [
+            'echo', '0.800000', '0.900000', '60', '0.1', '60', '1.0'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1482,7 +1536,9 @@ class TestTransformerEchos(unittest.TestCase):
         tfm.echos()
 
         actual_args = tfm.effects
-        expected_args = ['echos', '0.8', '0.9', '60', '0.4']
+        expected_args = [
+            'echos', '0.800000', '0.900000', '60.000000', '0.400000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -1498,7 +1554,9 @@ class TestTransformerEchos(unittest.TestCase):
         tfm.echos(gain_in=1.0)
 
         actual_args = tfm.effects
-        expected_args = ['echos', '1.0', '0.9', '60', '0.4']
+        expected_args = [
+            'echos', '1.000000', '0.900000', '60.000000', '0.400000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1515,7 +1573,9 @@ class TestTransformerEchos(unittest.TestCase):
         tfm.echos(gain_out=1.0)
 
         actual_args = tfm.effects
-        expected_args = ['echos', '0.8', '1.0', '60', '0.4']
+        expected_args = [
+            'echos', '0.800000', '1.000000', '60.000000', '0.400000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1532,7 +1592,10 @@ class TestTransformerEchos(unittest.TestCase):
         tfm.echos(n_echos=2, delays=[60, 60], decays=[0.4, 0.4])
 
         actual_args = tfm.effects
-        expected_args = ['echos', '0.8', '0.9', '60', '0.4', '60', '0.4']
+        expected_args = [
+            'echos', '0.800000', '0.900000', '60.000000', '0.400000',
+            '60.000000', '0.400000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1549,7 +1612,10 @@ class TestTransformerEchos(unittest.TestCase):
         tfm.echos(n_echos=2, delays=[1, 600], decays=[0.4, 0.4])
 
         actual_args = tfm.effects
-        expected_args = ['echos', '0.8', '0.9', '1', '0.4', '600', '0.4']
+        expected_args = [
+            'echos', '0.800000', '0.900000', '1.000000', '0.400000',
+            '600.000000', '0.400000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1576,7 +1642,10 @@ class TestTransformerEchos(unittest.TestCase):
         tfm.echos(n_echos=2, delays=[60, 60], decays=[0.1, 1.0])
 
         actual_args = tfm.effects
-        expected_args = ['echos', '0.8', '0.9', '60', '0.1', '60', '1.0']
+        expected_args = [
+            'echos', '0.800000', '0.900000', '60.000000', '0.100000',
+            '60.000000', '1.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1606,7 +1675,7 @@ class TestTransformerEqualizer(unittest.TestCase):
         tfm.equalizer(500.0, 2, 3)
 
         actual_args = tfm.effects
-        expected_args = ['equalizer', '500.0', '2q', '3']
+        expected_args = ['equalizer', '500.000000', '2.000000q', '3.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -1640,7 +1709,7 @@ class TestTransformerFade(unittest.TestCase):
         tfm.fade(fade_in_len=0.5)
 
         actual_args = tfm.effects
-        expected_args = ['fade', 'q', '0.5']
+        expected_args = ['fade', 'q', '0.500000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -1656,7 +1725,7 @@ class TestTransformerFade(unittest.TestCase):
         tfm.fade(fade_in_len=1.2)
 
         actual_args = tfm.effects
-        expected_args = ['fade', 'q', '1.2']
+        expected_args = ['fade', 'q', '1.200000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1673,7 +1742,7 @@ class TestTransformerFade(unittest.TestCase):
         tfm.fade(fade_out_len=3)
 
         actual_args = tfm.effects
-        expected_args = ['reverse', 'fade', 'q', '3', 'reverse']
+        expected_args = ['reverse', 'fade', 'q', '3.000000', 'reverse']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1690,7 +1759,7 @@ class TestTransformerFade(unittest.TestCase):
         tfm.fade(fade_shape='p', fade_in_len=1.5)
 
         actual_args = tfm.effects
-        expected_args = ['fade', 'p', '1.5']
+        expected_args = ['fade', 'p', '1.500000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1711,7 +1780,8 @@ class TestTransformerFir(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'fir', '0.0195', '-0.082', '0.234', '0.891', '-0.145', '0.043'
+            'fir', '0.019500', '-0.082000', '0.234000', '0.891000',
+            '-0.145000', '0.043000'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -1742,7 +1812,8 @@ class TestTransformerFlanger(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'flanger', '0', '2', '0', '71', '0.5', 'sine', '25', 'linear'
+            'flanger', '0.000000', '2.000000', '0.000000', '71.000000',
+            '0.500000', 'sine', '25.000000', 'linear'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -1760,7 +1831,8 @@ class TestTransformerFlanger(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'flanger', '10', '2', '0', '71', '0.5', 'sine', '25', 'linear'
+            'flanger', '10.000000', '2.000000', '0.000000', '71.000000',
+            '0.500000', 'sine', '25.000000', 'linear'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -1779,7 +1851,8 @@ class TestTransformerFlanger(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'flanger', '0', '0', '0', '71', '0.5', 'sine', '25', 'linear'
+            'flanger', '0.000000', '0.000000', '0.000000', '71.000000',
+            '0.500000', 'sine', '25.000000', 'linear'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -1798,7 +1871,8 @@ class TestTransformerFlanger(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'flanger', '0', '2', '-95', '71', '0.5', 'sine', '25', 'linear'
+            'flanger', '0.000000', '2.000000', '-95.000000', '71.000000',
+            '0.500000', 'sine', '25.000000', 'linear'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -1817,7 +1891,8 @@ class TestTransformerFlanger(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'flanger', '0', '2', '0', '0', '0.5', 'sine', '25', 'linear'
+            'flanger', '0.000000', '2.000000', '0.000000', '0.000000',
+            '0.500000', 'sine', '25.000000', 'linear'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -1836,7 +1911,8 @@ class TestTransformerFlanger(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'flanger', '0', '2', '0', '71', '10', 'sine', '25', 'linear'
+            'flanger', '0.000000', '2.000000', '0.000000', '71.000000',
+            '10.000000', 'sine', '25.000000', 'linear'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -1855,7 +1931,8 @@ class TestTransformerFlanger(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'flanger', '0', '2', '0', '71', '0.5', 'triangle', '25', 'linear'
+            'flanger', '0.000000', '2.000000', '0.000000', '71.000000',
+            '0.500000', 'triangle', '25.000000', 'linear'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -1874,7 +1951,8 @@ class TestTransformerFlanger(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'flanger', '0', '2', '0', '71', '0.5', 'sine', '95', 'linear'
+            'flanger', '0.000000', '2.000000', '0.000000', '71.000000',
+            '0.500000', 'sine', '95.000000', 'linear'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -1893,7 +1971,8 @@ class TestTransformerFlanger(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'flanger', '0', '2', '0', '71', '0.5', 'sine', '25', 'quadratic'
+            'flanger', '0.000000', '2.000000', '0.000000', '71.000000',
+            '0.500000', 'sine', '25.000000', 'quadratic'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -1914,7 +1993,7 @@ class TestTransformerGain(unittest.TestCase):
         tfm.gain()
 
         actual_args = tfm.effects
-        expected_args = ['gain', '-n', '0.0']
+        expected_args = ['gain', '-n', '0.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -1930,7 +2009,7 @@ class TestTransformerGain(unittest.TestCase):
         tfm.gain(gain_db=6)
 
         actual_args = tfm.effects
-        expected_args = ['gain', '-n', '6']
+        expected_args = ['gain', '-n', '6.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1947,7 +2026,7 @@ class TestTransformerGain(unittest.TestCase):
         tfm.gain(normalize=False)
 
         actual_args = tfm.effects
-        expected_args = ['gain', '0.0']
+        expected_args = ['gain', '0.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1964,7 +2043,7 @@ class TestTransformerGain(unittest.TestCase):
         tfm.gain(limiter=True)
 
         actual_args = tfm.effects
-        expected_args = ['gain', '-n', '-l', '0.0']
+        expected_args = ['gain', '-n', '-l', '0.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -1981,7 +2060,7 @@ class TestTransformerGain(unittest.TestCase):
         tfm.gain(balance='B')
 
         actual_args = tfm.effects
-        expected_args = ['gain', '-B', '-n', '0.0']
+        expected_args = ['gain', '-B', '-n', '0.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2001,7 +2080,7 @@ class TestTransformerHighpass(unittest.TestCase):
         tfm.highpass(1000.0)
 
         actual_args = tfm.effects
-        expected_args = ['highpass', '-2', '1000.0', '0.707q']
+        expected_args = ['highpass', '-2', '1000.000000', '0.707000q']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -2017,7 +2096,7 @@ class TestTransformerHighpass(unittest.TestCase):
         tfm.highpass(1000.0, n_poles=1)
 
         actual_args = tfm.effects
-        expected_args = ['highpass', '-1', '1000.0']
+        expected_args = ['highpass', '-1', '1000.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -2100,7 +2179,7 @@ class TestTransformerLowpass(unittest.TestCase):
         tfm.lowpass(1000.0)
 
         actual_args = tfm.effects
-        expected_args = ['lowpass', '-2', '1000.0', '0.707q']
+        expected_args = ['lowpass', '-2', '1000.000000', '0.707000q']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -2116,7 +2195,7 @@ class TestTransformerLowpass(unittest.TestCase):
         tfm.lowpass(1000.0, n_poles=1)
 
         actual_args = tfm.effects
-        expected_args = ['lowpass', '-1', '1000.0']
+        expected_args = ['lowpass', '-1', '1000.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -2150,7 +2229,7 @@ class TestTransformerLoudness(unittest.TestCase):
         tfm.loudness()
 
         actual_args = tfm.effects
-        expected_args = ['loudness', '-10.0', '65.0']
+        expected_args = ['loudness', '-10.000000', '65.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -2166,7 +2245,7 @@ class TestTransformerLoudness(unittest.TestCase):
         tfm.loudness(gain_db=0)
 
         actual_args = tfm.effects
-        expected_args = ['loudness', '0', '65.0']
+        expected_args = ['loudness', '0.000000', '65.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2183,7 +2262,7 @@ class TestTransformerLoudness(unittest.TestCase):
         tfm.loudness(reference_level=50)
 
         actual_args = tfm.effects
-        expected_args = ['loudness', '-10.0', '50']
+        expected_args = ['loudness', '-10.000000', '50.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2210,9 +2289,11 @@ class TestTransformerMcompand(unittest.TestCase):
         actual_args = tfm.effects
         expected_args = [
             'mcompand',
-            '"0.005,0.1 6.0:-47,-40,-34,-34,-17,-33,0,0"',
-            '1600',
-            '"0.000625,0.0125 -47,-40,-34,-34,-15,-33,0,0"'
+            '"0.005000,0.100000 6.000000:-47.000000,-40.000000,-34.000000,'
+            '-34.000000,-17.000000,-33.000000,0.000000,0.000000"',
+            '1600.000000',
+            '"0.000625,0.012500 -47.000000,-40.000000,-34.000000,-34.000000,'
+            '-15.000000,-33.000000,0.000000,0.000000"'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -2237,7 +2318,8 @@ class TestTransformerMcompand(unittest.TestCase):
         actual_args = tfm.effects
         expected_args = [
             'mcompand',
-            '"0.005,0.1 6.0:-47,-40,-34,-34,-17,-33,0,0"'
+            '"0.005000,0.100000 6.000000:-47.000000,-40.000000,-34.000000,'
+            '-34.000000,-17.000000,-33.000000,0.000000,0.000000"'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -2257,9 +2339,11 @@ class TestTransformerMcompand(unittest.TestCase):
         actual_args = tfm.effects
         expected_args = [
             'mcompand',
-            '"0.005,0.1 6.0:-47,-40,-34,-34,-17,-33,0,0"',
-            '100',
-            '"0.000625,0.0125 -47,-40,-34,-34,-15,-33,0,0"'
+            '"0.005000,0.100000 6.000000:-47.000000,-40.000000,-34.000000,'
+            '-34.000000,-17.000000,-33.000000,0.000000,0.000000"',
+            '100.000000',
+            '"0.000625,0.012500 -47.000000,-40.000000,-34.000000,-34.000000,'
+            '-15.000000,-33.000000,0.000000,0.000000"'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -2284,9 +2368,11 @@ class TestTransformerMcompand(unittest.TestCase):
         actual_args = tfm.effects
         expected_args = [
             'mcompand',
-            '"0.5,0.1 6.0:-47,-40,-34,-34,-17,-33,0,0"',
-            '1600',
-            '"0.0625,0.0125 -47,-40,-34,-34,-15,-33,0,0"'
+            '"0.500000,0.100000 6.000000:-47.000000,-40.000000,-34.000000,'
+            '-34.000000,-17.000000,-33.000000,0.000000,0.000000"',
+            '1600.000000',
+            '"0.062500,0.012500 -47.000000,-40.000000,-34.000000,-34.000000,'
+            '-15.000000,-33.000000,0.000000,0.000000"'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -2321,9 +2407,11 @@ class TestTransformerMcompand(unittest.TestCase):
         actual_args = tfm.effects
         expected_args = [
             'mcompand',
-            '"0.005,0.001 6.0:-47,-40,-34,-34,-17,-33,0,0"',
-            '1600',
-            '"0.000625,0.5 -47,-40,-34,-34,-15,-33,0,0"'
+            '"0.005000,0.001000 6.000000:-47.000000,-40.000000,-34.000000,'
+            '-34.000000,-17.000000,-33.000000,0.000000,0.000000"',
+            '1600.000000',
+            '"0.000625,0.500000 -47.000000,-40.000000,-34.000000,-34.000000,'
+            '-15.000000,-33.000000,0.000000,0.000000"'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -2358,9 +2446,11 @@ class TestTransformerMcompand(unittest.TestCase):
         actual_args = tfm.effects
         expected_args = [
             'mcompand',
-            '"0.005,0.1 -2:-47,-40,-34,-34,-17,-33,0,0"',
-            '1600',
-            '"0.000625,0.0125 -5:-47,-40,-34,-34,-15,-33,0,0"'
+            '"0.005000,0.100000 -2.000000:-47.000000,-40.000000,-34.000000,'
+            '-34.000000,-17.000000,-33.000000,0.000000,0.000000"',
+            '1600.000000',
+            '"0.000625,0.012500 -5.000000:-47.000000,-40.000000,-34.000000,'
+            '-34.000000,-15.000000,-33.000000,0.000000,0.000000"'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -2375,9 +2465,11 @@ class TestTransformerMcompand(unittest.TestCase):
         actual_args = tfm.effects
         expected_args = [
             'mcompand',
-            '"0.005,0.1 -47,-40,-34,-34,-17,-33,0,0"',
-            '1600',
-            '"0.000625,0.0125 -47,-40,-34,-34,-15,-33,0,0"'
+            '"0.005000,0.100000 -47.000000,-40.000000,-34.000000,-34.000000,'
+            '-17.000000,-33.000000,0.000000,0.000000"',
+            '1600.000000',
+            '"0.000625,0.012500 -47.000000,-40.000000,-34.000000,-34.000000,'
+            '-15.000000,-33.000000,0.000000,0.000000"'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -2412,9 +2504,10 @@ class TestTransformerMcompand(unittest.TestCase):
         actual_args = tfm.effects
         expected_args = [
             'mcompand',
-            '"0.005,0.1 6.0:-70,-60,-60,-20,-40,-40,0,-4"',
-            '1600',
-            '"0.000625,0.0125 -70,-60,0,-4"'
+            '"0.005000,0.100000 6.000000:-70.000000,-60.000000,-60.000000,'
+            '-20.000000,-40.000000,-40.000000,0.000000,-4.000000"',
+            '1600.000000',
+            '"0.000625,0.012500 -70.000000,-60.000000,0.000000,-4.000000"'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -2478,9 +2571,11 @@ class TestTransformerMcompand(unittest.TestCase):
         actual_args = tfm.effects
         expected_args = [
             'mcompand',
-            '"0.005,0.1 6.0:-47,-40,-34,-34,-17,-33,0,0 3.0"',
-            '1600',
-            '"0.000625,0.0125 -47,-40,-34,-34,-15,-33,0,0 -1.0"'
+            '"0.005000,0.100000 6.000000:-47.000000,-40.000000,-34.000000,'
+            '-34.000000,-17.000000,-33.000000,0.000000,0.000000 3.000000"',
+            '1600.000000',
+            '"0.000625,0.012500 -47.000000,-40.000000,-34.000000,-34.000000,'
+            '-15.000000,-33.000000,0.000000,0.000000 -1.000000"'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -2510,7 +2605,7 @@ class TestTransformerNorm(unittest.TestCase):
         tfm.norm()
 
         actual_args = tfm.effects
-        expected_args = ['norm', '-3.0']
+        expected_args = ['norm', '-3.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -2526,7 +2621,7 @@ class TestTransformerNorm(unittest.TestCase):
         tfm.norm(db_level=0)
 
         actual_args = tfm.effects
-        expected_args = ['norm', '0']
+        expected_args = ['norm', '0.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2565,7 +2660,7 @@ class TestTransformerOverdrive(unittest.TestCase):
         tfm.overdrive()
 
         actual_args = tfm.effects
-        expected_args = ['overdrive', '20.0', '20.0']
+        expected_args = ['overdrive', '20.000000', '20.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -2581,7 +2676,7 @@ class TestTransformerOverdrive(unittest.TestCase):
         tfm.overdrive(gain_db=2)
 
         actual_args = tfm.effects
-        expected_args = ['overdrive', '2', '20.0']
+        expected_args = ['overdrive', '2.000000', '20.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2598,7 +2693,7 @@ class TestTransformerOverdrive(unittest.TestCase):
         tfm.overdrive(colour=0)
 
         actual_args = tfm.effects
-        expected_args = ['overdrive', '20.0', '0']
+        expected_args = ['overdrive', '20.000000', '0.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2618,7 +2713,7 @@ class TestTransformerPad(unittest.TestCase):
         tfm.pad()
 
         actual_args = tfm.effects
-        expected_args = ['pad', '0.0', '0.0']
+        expected_args = ['pad', '0.000000', '0.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -2634,7 +2729,7 @@ class TestTransformerPad(unittest.TestCase):
         tfm.pad(start_duration=3)
 
         actual_args = tfm.effects
-        expected_args = ['pad', '3', '0.0']
+        expected_args = ['pad', '3.000000', '0.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2651,7 +2746,7 @@ class TestTransformerPad(unittest.TestCase):
         tfm.pad(end_duration=0.2)
 
         actual_args = tfm.effects
-        expected_args = ['pad', '0.0', '0.2']
+        expected_args = ['pad', '0.000000', '0.200000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2671,7 +2766,10 @@ class TestTransformerPhaser(unittest.TestCase):
         tfm.phaser()
 
         actual_args = tfm.effects
-        expected_args = ['phaser', '0.8', '0.74', '3', '0.4', '0.5', '-s']
+        expected_args = [
+            'phaser', '0.800000', '0.740000', '3.000000', '0.400000',
+            '0.500000', '-s'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -2687,7 +2785,9 @@ class TestTransformerPhaser(unittest.TestCase):
         tfm.phaser(gain_in=0.5)
 
         actual_args = tfm.effects
-        expected_args = ['phaser', '0.5', '0.74', '3', '0.4', '0.5', '-s']
+        expected_args = [
+            'phaser', '0.500000', '0.740000', '3.000000', '0.400000',
+            '0.500000', '-s']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2704,7 +2804,9 @@ class TestTransformerPhaser(unittest.TestCase):
         tfm.phaser(gain_out=1.0)
 
         actual_args = tfm.effects
-        expected_args = ['phaser', '0.8', '1.0', '3', '0.4', '0.5', '-s']
+        expected_args = [
+            'phaser', '0.800000', '1.000000', '3.000000', '0.400000',
+            '0.500000', '-s']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2721,7 +2823,10 @@ class TestTransformerPhaser(unittest.TestCase):
         tfm.phaser(delay=5)
 
         actual_args = tfm.effects
-        expected_args = ['phaser', '0.8', '0.74', '5', '0.4', '0.5', '-s']
+        expected_args = [
+            'phaser', '0.800000', '0.740000', '5.000000', '0.400000',
+            '0.500000', '-s'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2738,7 +2843,10 @@ class TestTransformerPhaser(unittest.TestCase):
         tfm.phaser(decay=0.1)
 
         actual_args = tfm.effects
-        expected_args = ['phaser', '0.8', '0.74', '3', '0.1', '0.5', '-s']
+        expected_args = [
+            'phaser', '0.800000', '0.740000', '3.000000', '0.100000',
+            '0.500000', '-s'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2755,7 +2863,10 @@ class TestTransformerPhaser(unittest.TestCase):
         tfm.phaser(speed=2)
 
         actual_args = tfm.effects
-        expected_args = ['phaser', '0.8', '0.74', '3', '0.4', '2', '-s']
+        expected_args = [
+            'phaser', '0.800000', '0.740000', '3.000000', '0.400000',
+            '2.000000', '-s'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2772,7 +2883,10 @@ class TestTransformerPhaser(unittest.TestCase):
         tfm.phaser(modulation_shape='triangular')
 
         actual_args = tfm.effects
-        expected_args = ['phaser', '0.8', '0.74', '3', '0.4', '0.5', '-t']
+        expected_args = [
+            'phaser', '0.800000', '0.740000', '3.000000', '0.400000',
+            '0.500000', '-t'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2792,7 +2906,7 @@ class TestTransformerPitch(unittest.TestCase):
         tfm.pitch(0.0)
 
         actual_args = tfm.effects
-        expected_args = ['pitch', '0.0']
+        expected_args = ['pitch', '0.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -2808,7 +2922,7 @@ class TestTransformerPitch(unittest.TestCase):
         tfm.pitch(-3.0)
 
         actual_args = tfm.effects
-        expected_args = ['pitch', '-300.0']
+        expected_args = ['pitch', '-300.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2820,7 +2934,7 @@ class TestTransformerPitch(unittest.TestCase):
         tfm.pitch(13.0)
 
         actual_args = tfm.effects
-        expected_args = ['pitch', '1300.0']
+        expected_args = ['pitch', '1300.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2837,7 +2951,7 @@ class TestTransformerPitch(unittest.TestCase):
         tfm.pitch(1.0, quick=True)
 
         actual_args = tfm.effects
-        expected_args = ['pitch', '-q', '100.0']
+        expected_args = ['pitch', '-q', '100.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2857,7 +2971,7 @@ class TestTransformerRate(unittest.TestCase):
         tfm.rate(48000)
 
         actual_args = tfm.effects
-        expected_args = ['rate', '-h', '48000']
+        expected_args = ['rate', '-h', '48000.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -2873,7 +2987,7 @@ class TestTransformerRate(unittest.TestCase):
         tfm.rate(1000.5)
 
         actual_args = tfm.effects
-        expected_args = ['rate', '-h', '1000.5']
+        expected_args = ['rate', '-h', '1000.500000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -2890,7 +3004,7 @@ class TestTransformerRate(unittest.TestCase):
         tfm.rate(44100.0, quality='q')
 
         actual_args = tfm.effects
-        expected_args = ['rate', '-q', '44100.0']
+        expected_args = ['rate', '-q', '44100.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3027,7 +3141,10 @@ class TestTransformerReverb(unittest.TestCase):
         tfm.reverb()
 
         actual_args = tfm.effects
-        expected_args = ['reverb', '50', '50', '100', '100', '0', '0']
+        expected_args = [
+            'reverb', '50.000000', '50.000000', '100.000000', '100.000000',
+            '0.000000', '0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3043,7 +3160,10 @@ class TestTransformerReverb(unittest.TestCase):
         tfm.reverb(reverberance=90)
 
         actual_args = tfm.effects
-        expected_args = ['reverb', '90', '50', '100', '100', '0', '0']
+        expected_args = [
+            'reverb', '90.000000', '50.000000', '100.000000', '100.000000',
+            '0.000000', '0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3060,7 +3180,10 @@ class TestTransformerReverb(unittest.TestCase):
         tfm.reverb(high_freq_damping=10)
 
         actual_args = tfm.effects
-        expected_args = ['reverb', '50', '10', '100', '100', '0', '0']
+        expected_args = [
+            'reverb', '50.000000', '10.000000', '100.000000', '100.000000',
+            '0.000000', '0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3077,7 +3200,10 @@ class TestTransformerReverb(unittest.TestCase):
         tfm.reverb(room_scale=10)
 
         actual_args = tfm.effects
-        expected_args = ['reverb', '50', '50', '10', '100', '0', '0']
+        expected_args = [
+            'reverb', '50.000000', '50.000000', '10.000000', '100.000000',
+            '0.000000', '0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3094,7 +3220,10 @@ class TestTransformerReverb(unittest.TestCase):
         tfm.reverb(stereo_depth=50)
 
         actual_args = tfm.effects
-        expected_args = ['reverb', '50', '50', '100', '50', '0', '0']
+        expected_args = [
+            'reverb', '50.000000', '50.000000', '100.000000', '50.000000',
+            '0.000000', '0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3111,7 +3240,10 @@ class TestTransformerReverb(unittest.TestCase):
         tfm.reverb(pre_delay=10)
 
         actual_args = tfm.effects
-        expected_args = ['reverb', '50', '50', '100', '100', '10', '0']
+        expected_args = [
+            'reverb', '50.000000', '50.000000', '100.000000', '100.000000',
+            '10.000000', '0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3128,7 +3260,10 @@ class TestTransformerReverb(unittest.TestCase):
         tfm.reverb(wet_gain=5)
 
         actual_args = tfm.effects
-        expected_args = ['reverb', '50', '50', '100', '100', '0', '5']
+        expected_args = [
+            'reverb', '50.000000', '50.000000', '100.000000', '100.000000',
+            '0.000000', '5.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3145,7 +3280,10 @@ class TestTransformerReverb(unittest.TestCase):
         tfm.reverb(wet_only=True)
 
         actual_args = tfm.effects
-        expected_args = ['reverb', '-w', '50', '50', '100', '100', '0', '0']
+        expected_args = [
+            'reverb', '-w', '50.000000', '50.000000', '100.000000',
+            '100.000000', '0.000000', '0.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3184,7 +3322,10 @@ class TestTransformerSilence(unittest.TestCase):
         tfm.silence()
 
         actual_args = tfm.effects
-        expected_args = ['silence', '1', '0.1', '0.1%', '-1', '0.1', '0.1%']
+        expected_args = [
+            'silence', '1', '0.100000', '0.100000%',
+            '-1', '0.100000', '0.100000%'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3200,7 +3341,7 @@ class TestTransformerSilence(unittest.TestCase):
         tfm.silence(location=1)
 
         actual_args = tfm.effects
-        expected_args = ['silence', '1', '0.1', '0.1%']
+        expected_args = ['silence', '1', '0.100000', '0.100000%']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3212,7 +3353,9 @@ class TestTransformerSilence(unittest.TestCase):
         tfm.silence(location=-1)
 
         actual_args = tfm.effects
-        expected_args = ['reverse', 'silence', '1', '0.1', '0.1%', 'reverse']
+        expected_args = [
+            'reverse', 'silence', '1', '0.100000', '0.100000%', 'reverse'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3229,7 +3372,10 @@ class TestTransformerSilence(unittest.TestCase):
         tfm.silence(silence_threshold=10.5)
 
         actual_args = tfm.effects
-        expected_args = ['silence', '1', '0.1', '10.5%', '-1', '0.1', '10.5%']
+        expected_args = [
+            'silence', '1', '0.100000', '10.500000%',
+            '-1', '0.100000', '10.500000%'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3251,7 +3397,9 @@ class TestTransformerSilence(unittest.TestCase):
         tfm.silence(min_silence_duration=2)
 
         actual_args = tfm.effects
-        expected_args = ['silence', '1', '2', '0.1%', '-1', '2', '0.1%']
+        expected_args = [
+            'silence', '1', '2.000000', '0.100000%',
+            '-1', '2.000000', '0.100000%']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3269,7 +3417,8 @@ class TestTransformerSilence(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'silence', '-l', '1', '0.1', '0.1%', '-1', '0.1', '0.1%'
+            'silence', '-l', '1', '0.100000', '0.100000%',
+            '-1', '0.100000', '0.100000%'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -3290,7 +3439,7 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc()
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '3000']
+        expected_args = ['sinc', '-a', '120.000000', '3000.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3306,7 +3455,7 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(filter_type='low')
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '-3000']
+        expected_args = ['sinc', '-a', '120.000000', '-3000.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3318,7 +3467,7 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(filter_type='pass', cutoff_freq=[3000, 4000])
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '3000-4000']
+        expected_args = ['sinc', '-a', '120.000000', '3000.000000-4000.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3330,7 +3479,7 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(filter_type='reject', cutoff_freq=[3000, 4000])
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '4000-3000']
+        expected_args = ['sinc', '-a', '120.000000', '4000.000000-3000.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3347,7 +3496,7 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(cutoff_freq=300.4)
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '300.4']
+        expected_args = ['sinc', '-a', '120.000000', '300.400000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3359,7 +3508,7 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(filter_type='pass', cutoff_freq=[300.4, 1000])
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '300.4-1000']
+        expected_args = ['sinc', '-a', '120.000000', '300.400000-1000.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3371,7 +3520,7 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(filter_type='pass', cutoff_freq=[1000, 300.4])
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '300.4-1000']
+        expected_args = ['sinc', '-a', '120.000000', '300.400000-1000.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3413,7 +3562,7 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(stop_band_attenuation=60)
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '60', '3000']
+        expected_args = ['sinc', '-a', '60.000000', '3000.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3430,7 +3579,9 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(filter_type='high', transition_bw=100)
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '-t', '100', '3000']
+        expected_args = [
+            'sinc', '-a', '120.000000', '-t', '100.000000', '3000.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3446,7 +3597,9 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(filter_type='low', transition_bw=100)
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '-3000', '-t', '100']
+        expected_args = [
+            'sinc', '-a', '120.000000', '-3000.000000', '-t', '100.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3464,7 +3617,10 @@ class TestTransformerSinc(unittest.TestCase):
         )
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '-t', '100', '3000-4000']
+        expected_args = [
+            'sinc', '-a', '120.000000', '-t', '100.000000',
+            '3000.000000-4000.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3484,7 +3640,8 @@ class TestTransformerSinc(unittest.TestCase):
 
         actual_args = tfm.effects
         expected_args = [
-            'sinc', '-a', '120', '-t', '100', '3000-4000', '-t', '200'
+            'sinc', '-a', '120.000000', '-t', '100.000000',
+            '3000.000000-4000.000000', '-t', '200.000000'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -3532,7 +3689,9 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(phase_response=0)
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '-p', '0', '3000']
+        expected_args = [
+            'sinc', '-a', '120.000000', '-p', '0.000000', '3000.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3548,7 +3707,9 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(phase_response=25)
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '-p', '25', '3000']
+        expected_args = [
+            'sinc', '-a', '120.000000', '-p', '25.000000', '3000.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3564,7 +3725,9 @@ class TestTransformerSinc(unittest.TestCase):
         tfm.sinc(phase_response=100)
 
         actual_args = tfm.effects
-        expected_args = ['sinc', '-a', '120', '-p', '100', '3000']
+        expected_args = [
+            'sinc', '-a', '120.000000', '-p', '100.000000', '3000.000000'
+        ]
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3598,7 +3761,7 @@ class TestTransformerSpeed(unittest.TestCase):
         tfm.speed(1.5)
 
         actual_args = tfm.effects
-        expected_args = ['speed', '1.5']
+        expected_args = ['speed', '1.500000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3614,7 +3777,7 @@ class TestTransformerSpeed(unittest.TestCase):
         tfm.speed(0.7)
 
         actual_args = tfm.effects
-        expected_args = ['speed', '0.7']
+        expected_args = ['speed', '0.700000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3626,7 +3789,7 @@ class TestTransformerSpeed(unittest.TestCase):
         tfm.speed(2.5)
 
         actual_args = tfm.effects
-        expected_args = ['speed', '2.5']
+        expected_args = ['speed', '2.500000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3665,7 +3828,7 @@ class TestTransformerStretch(unittest.TestCase):
         tfm.stretch(1.1)
 
         actual_args = tfm.effects
-        expected_args = ['stretch', '1.1', '20']
+        expected_args = ['stretch', '1.100000', '20.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3681,7 +3844,7 @@ class TestTransformerStretch(unittest.TestCase):
         tfm.stretch(0.7)
 
         actual_args = tfm.effects
-        expected_args = ['stretch', '0.7', '20']
+        expected_args = ['stretch', '0.700000', '20.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3693,7 +3856,7 @@ class TestTransformerStretch(unittest.TestCase):
         tfm.stretch(0.2)
 
         actual_args = tfm.effects
-        expected_args = ['stretch', '0.2', '20']
+        expected_args = ['stretch', '0.200000', '20.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3710,7 +3873,7 @@ class TestTransformerStretch(unittest.TestCase):
         tfm.stretch(0.99, window=10)
 
         actual_args = tfm.effects
-        expected_args = ['stretch', '0.99', '10']
+        expected_args = ['stretch', '0.990000', '10.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3730,7 +3893,7 @@ class TestTransformerTempo(unittest.TestCase):
         tfm.tempo(1.1)
 
         actual_args = tfm.effects
-        expected_args = ['tempo', '1.1']
+        expected_args = ['tempo', '1.100000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3746,7 +3909,7 @@ class TestTransformerTempo(unittest.TestCase):
         tfm.tempo(0.9)
 
         actual_args = tfm.effects
-        expected_args = ['tempo', '0.9']
+        expected_args = ['tempo', '0.900000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3758,7 +3921,7 @@ class TestTransformerTempo(unittest.TestCase):
         tfm.tempo(0.1)
 
         actual_args = tfm.effects
-        expected_args = ['tempo', '0.1']
+        expected_args = ['tempo', '0.100000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3775,7 +3938,7 @@ class TestTransformerTempo(unittest.TestCase):
         tfm.tempo(1.5, audio_type='m')
 
         actual_args = tfm.effects
-        expected_args = ['tempo', '-m', '1.5']
+        expected_args = ['tempo', '-m', '1.500000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3792,7 +3955,7 @@ class TestTransformerTempo(unittest.TestCase):
         tfm.tempo(1.5, quick=True)
 
         actual_args = tfm.effects
-        expected_args = ['tempo', '-q', '1.5']
+        expected_args = ['tempo', '-q', '1.500000']
         self.assertEqual(expected_args, actual_args)
 
         actual_res = tfm.build(INPUT_FILE, OUTPUT_FILE)
@@ -3812,7 +3975,7 @@ class TestTransformerTreble(unittest.TestCase):
         tfm.treble(20.0)
 
         actual_args = tfm.effects
-        expected_args = ['treble', '20.0', '3000.0', '0.5s']
+        expected_args = ['treble', '20.000000', '3000.000000', '0.500000s']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3846,7 +4009,7 @@ class TestTransformerTremolo(unittest.TestCase):
         tfm.tremolo()
 
         actual_args = tfm.effects
-        expected_args = ['tremolo', '6.0', '40.0']
+        expected_args = ['tremolo', '6.000000', '40.000000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3875,7 +4038,7 @@ class TestTransformerTrim(unittest.TestCase):
         tfm.trim(0, 8.5)
 
         actual_args = tfm.effects
-        expected_args = ['trim', '0', '8.5']
+        expected_args = ['trim', '0.000000', '8.500000']
         self.assertEqual(expected_args, actual_args)
 
         actual_log = tfm.effects_log
@@ -3949,11 +4112,11 @@ class TestTransformerVad(unittest.TestCase):
         actual_args = tfm.effects
         expected_args = [
             'norm', 'vad',
-            '-t', '7.0',
-            '-T', '0.25',
-            '-s', '1.0',
-            '-g', '0.25',
-            '-p', '0.0'
+            '-t', '7.000000',
+            '-T', '0.250000',
+            '-s', '1.000000',
+            '-g', '0.250000',
+            '-p', '0.000000'
         ]
         self.assertEqual(expected_args, actual_args)
 
@@ -3974,11 +4137,11 @@ class TestTransformerVad(unittest.TestCase):
             'norm',
             'reverse',
             'vad',
-            '-t', '7.0',
-            '-T', '0.25',
-            '-s', '1.0',
-            '-g', '0.25',
-            '-p', '0.0',
+            '-t', '7.000000',
+            '-T', '0.250000',
+            '-s', '1.000000',
+            '-g', '0.250000',
+            '-p', '0.000000',
             'reverse'
         ]
         self.assertEqual(expected_args, actual_args)
@@ -3998,11 +4161,11 @@ class TestTransformerVad(unittest.TestCase):
         actual_args = tfm.effects
         expected_args = [
             'vad',
-            '-t', '7.0',
-            '-T', '0.25',
-            '-s', '1.0',
-            '-g', '0.25',
-            '-p', '0.0'
+            '-t', '7.000000',
+            '-T', '0.250000',
+            '-s', '1.000000',
+            '-g', '0.250000',
+            '-p', '0.000000'
         ]
         self.assertEqual(expected_args, actual_args)
 

pip install -e .[tests]
parse_log_pytest
pytest
pytest pytest-cov pytest-pep8
apt-get update apt-get install -y gcc sox
3.9
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
coverage==7.8.0
exceptiongroup @ file:///croot/exceptiongroup_1706031385326/work
execnet==2.1.1
iniconfig @ file:///home/linux1/recipes/ci/iniconfig_1610983019677/work
packaging @ file:///croot/packaging_1734472117206/work
pep8==1.7.1
pluggy @ file:///croot/pluggy_1733169602837/work
pytest @ file:///croot/pytest_1738938843180/work
pytest-cache==1.0
pytest-cov==6.0.0
pytest-pep8==1.0.6
-e git+https://github.com/rabitt/pysox.git@45ae6164cd5da402e063d7d5487b3ebaf895dd4d#egg=sox
tomli @ file:///opt/conda/conda-bld/tomli_1657175507142/work

name: pysox
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - exceptiongroup=1.2.0=py39h06a4308_0
  - iniconfig=1.1.1=pyhd3eb1b0_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.4.4=h6a678d5_1
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=3.0.16=h5eee18b_0
  - packaging=24.2=py39h06a4308_0
  - pip=25.0=py39h06a4308_0
  - pluggy=1.5.0=py39h06a4308_0
  - pytest=8.3.4=py39h06a4308_0
  - python=3.9.21=he870216_1
  - readline=8.2=h5eee18b_0
  - setuptools=75.8.0=py39h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - tomli=2.0.1=py39h06a4308_0
  - tzdata=2025a=h04d1e81_0
  - wheel=0.45.1=py39h06a4308_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - coverage==7.8.0
      - execnet==2.1.1
      - pep8==1.7.1
      - pytest-cache==1.0
      - pytest-cov==6.0.0
      - pytest-pep8==1.0.6
prefix: /opt/conda/envs/pysox

tests/test_transform.py::TestTransformSetInputFormat::test_rate tests/test_transform.py::TestTransformSetInputFormat::test_rate_scinotation tests/test_transform.py::TestTransformSetOutputFormat::test_rate tests/test_transform.py::TestTransformSetOutputFormat::test_rate_scinotation tests/test_transform.py::TestTransformerAllpass::test_default tests/test_transform.py::TestTransformerBandpass::test_constant_skirt tests/test_transform.py::TestTransformerBandpass::test_default tests/test_transform.py::TestTransformerBandreject::test_default tests/test_transform.py::TestTransformerBass::test_default tests/test_transform.py::TestTransformerBend::test_default tests/test_transform.py::TestTransformerBend::test_frame_rate_valid tests/test_transform.py::TestTransformerBend::test_oversample_rate_valid tests/test_transform.py::TestTransformerBiquad::test_default tests/test_transform.py::TestTransformerChorus::test_explicit_args tests/test_transform.py::TestTransformerContrast::test_default tests/test_transform.py::TestTransformerCompand::test_attack_bigger_decay tests/test_transform.py::TestTransformerCompand::test_attack_time_valid tests/test_transform.py::TestTransformerCompand::test_decay_time_valid tests/test_transform.py::TestTransformerCompand::test_default tests/test_transform.py::TestTransformerCompand::test_soft_knee_none tests/test_transform.py::TestTransformerCompand::test_soft_knee_valid tests/test_transform.py::TestTransformerCompand::test_tf_points_valid tests/test_transform.py::TestTransformerConvert::test_samplerate_valid tests/test_transform.py::TestTransformerDcshift::test_default tests/test_transform.py::TestTransformerDelay::test_default tests/test_transform.py::TestTransformerDelay::test_default_three_channel tests/test_transform.py::TestTransformerEcho::test_decays_valid tests/test_transform.py::TestTransformerEcho::test_default tests/test_transform.py::TestTransformerEcho::test_delays_valid tests/test_transform.py::TestTransformerEcho::test_gain_in_valid tests/test_transform.py::TestTransformerEcho::test_gain_out_valid tests/test_transform.py::TestTransformerEcho::test_n_echos_valid tests/test_transform.py::TestTransformerEchos::test_decays_valid tests/test_transform.py::TestTransformerEchos::test_default tests/test_transform.py::TestTransformerEchos::test_delays_valid tests/test_transform.py::TestTransformerEchos::test_gain_in_valid tests/test_transform.py::TestTransformerEchos::test_gain_out_valid tests/test_transform.py::TestTransformerEchos::test_n_echos_valid tests/test_transform.py::TestTransformerEqualizer::test_default tests/test_transform.py::TestTransformerFade::test_default tests/test_transform.py::TestTransformerFade::test_fade_in_valid tests/test_transform.py::TestTransformerFade::test_fade_out_valid tests/test_transform.py::TestTransformerFade::test_fade_shape_valid tests/test_transform.py::TestTransformerFir::test_default tests/test_transform.py::TestTransformerFlanger::test_default tests/test_transform.py::TestTransformerFlanger::test_flanger_delay_valid tests/test_transform.py::TestTransformerFlanger::test_flanger_depth_valid tests/test_transform.py::TestTransformerFlanger::test_flanger_interp_valid tests/test_transform.py::TestTransformerFlanger::test_flanger_phase_valid tests/test_transform.py::TestTransformerFlanger::test_flanger_regen_valid tests/test_transform.py::TestTransformerFlanger::test_flanger_shape_valid tests/test_transform.py::TestTransformerFlanger::test_flanger_speed_valid tests/test_transform.py::TestTransformerFlanger::test_flanger_width_valid tests/test_transform.py::TestTransformerGain::test_balance_valid tests/test_transform.py::TestTransformerGain::test_default tests/test_transform.py::TestTransformerGain::test_gain_db_valid tests/test_transform.py::TestTransformerGain::test_limiter_valid tests/test_transform.py::TestTransformerGain::test_normalize_valid 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sox/transform.py sox/version.py
sox/transform.py sox/version.py