code: def __init__(self, freq, **kwargs):
      super(Sine, self).__init__(**kwargs)
      self.freq = freq
  
imports: import math
  import array
  import itertools
  import random
  from .audio_segment import AudioSegment
  from .utils import db_to_float, get_frame_width, get_array_type, get_min_max_value
label_desc: Use image node_id 1 to create a new Sine object from inherited base classes: SignalGenerator with example: obj = Sine(freq)