class_docstr: Abstract base class for pitch shifting transformations
class_docstr_tok: ["Abstract","base","class","for","pitch","shifting","transformations"]
code: def audio(mudabox, state):
      mudabox._audio["y"] = pyrb.pitch_shift(
          mudabox._audio["y"],
          mudabox._audio["sr"],
          state["n_semitones"],
      )
  
imports: import librosa
  import pyrubberband
  import re
  import numpy
  import six
  from copy import deepcopy
  from ..base import BaseTransformer, _get_rng
label_desc: Use image node_id 3 for calling the AbstractPitchShift obj's underlying member method code with example usage: obj.audio(mudabox, state) without return types