title: TypeError: 'module' object is not callable . MFCC
body: <p>Working on a project based on speaker recognition using python and  getting the following error while finding <code>MFCC</code>.</p>
  
  <pre><code>Traceback (most recent call last):
  File "neh1.py", line 10, in &lt;module&gt;
      complexSpectrum = numpy.fft(signal)
  TypeError: 'module' object is not callable
  </code></pre>
  
  <p>This is the part of code:</p>
  
  <pre><code>import numpy
  from scipy.fftpack import dct
  from scipy.io import wavfile
  sampleRate, signal = wavfile.read("/home/neha/Audio/b6.wav")
  numCoefficients = 13 # choose the sive of mfcc array
  minHz = 0
  maxHz = 22.000
  complexSpectrum = numpy.fft(signal)
  powerSpectrum = abs(complexSpectrum) ** 2
  filteredSpectrum = numpy.dot(powerSpectrum, melFilterBank())
  logSpectrum = numpy.log(filteredSpectrum)
  dctSpectrum = dct(logSpectrum, type=2) 
  </code></pre>
  
  <p>What would be the issue? </p>