code: def __init__(self, sample_rate=44100, bit_depth=16):
      self.sample_rate = sample_rate
      self.bit_depth = bit_depth
  
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 SignalGenerator object from inherited base classes: object with example: obj = SignalGenerator(sample_rate, bit_depth)