code: def load_signal(fn, *args, **kwargs):
      return Signal(load_audio_file(fn, *args, **kwargs)[0])
  
imports: from __future__ import absolute_import, division, print_function
  import io
  import unittest
  from os.path import join
  from madmom.io.audio import *
  from .None import AUDIO_PATH, DATA_PATH
label_desc: Use image node_id 1 for calling a global function with example usage: load_signal(fn) and returns: Signal