code: def slice_clip(filename, start, stop, n_samples, sr, mono=True):
      """Slice a fragment of audio from a file.
  
      This uses pysoundfile to efficiently seek without
      loading the entire stream.
  
      Parameters
      ----------
      filename : str
          Path to the input file
  
      start : int
          The sample index of `filename` at which the audio fragment should start
  
      stop : int
          The sample index of `filename` at which the audio fragment should stop (e.g. y = audio[start:stop])
  
      n_samples : int > 0
          The number of samples to load
  
      sr : int > 0
          The target sampling rate
  
      mono : bool
          Ensure monophonic audio
  
      Returns
      -------
      y : np.ndarray [shape=(n_samples,)]
          A fragment of audio sampled from `filename`
  
      Raises
      ------
      ValueError
          If the source file is shorter than the requested length
  
      """
  
      with psf.SoundFile(str(filename), mode="r") as soundf:
          n_target = stop - start
  
          soundf.seek(start)
  
          y = soundf.read(n_target).T
  
          if mono:
              y = librosa.to_mono(y)
  
          # Resample to initial sr
          y = librosa.resample(y, soundf.samplerate, sr)
  
          # Clip to the target length exactly
          y = librosa.util.fix_length(y, n_samples)
  
          return y
  
file_path: muda/muda/deformers/background.py
imports: import soundfile
  import librosa
  import numpy
  import os
  import six
  from ..base import BaseTransformer, _get_rng
label_desc: Use image node_id 2 for calling a global function with example usage: slice_clip(filename, start, stop, n_samples, sr, mono) and returns: y