old_contents: # Copyright (C) 2006-2016  Music Technology Group - Universitat Pompeu Fabra
  #
  # This file is part of Essentia
  #
  # Essentia is free software: you can redistribute it and/or modify it under
  # the terms of the GNU Affero General Public License as published by the Free
  # Software Foundation (FSF), either version 3 of the License, or (at your
  # option) any later version.
  #
  # This program is distributed in the hope that it will be useful, but WITHOUT
  # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  # FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  # details.
  #
  # You should have received a copy of the Affero GNU General Public License
  # version 3 along with this program. If not, see http://www.gnu.org/licenses/
  
  import essentia.standard
  import tempfile
  
  def test_audiofile(filename=None, type='sin440', duration=1):
  
      """Create a dummy wav audio file.
      This can be useful for tests that require loading audio files.
      
      Args:
          filename (string): Filename (default=None). If not specified, a 
              named temporary file will be created. 
          type (string): The type of audio to generate: 'silence' or 'sin440' 
              (default)
          duration (float): duration of audio in seconds (default 1 sec.)
      Returns:
          (string): Name of a temporary audio file
      """
      if type == 'sin440':
          samples = np.sin(2*np.pi*np.arange(44100*duration)*440/44100).astype(np.float32)
      elif type == 'silence':
          samples = [0] * int(44100 * duration)
      else:
          raise (ValueError, 'Wrong audio type:', type)
      
      if not filename:
          tf = tempfile.NamedTemporaryFile(delete=False, suffix=".wav")
          tf.close()
          filename = tf.name
  
      essentia.standard.MonoWriter(filename=filename)(samples)
      return filename
  
new_contents: # Copyright (C) 2006-2016  Music Technology Group - Universitat Pompeu Fabra
  #
  # This file is part of Essentia
  #
  # Essentia is free software: you can redistribute it and/or modify it under
  # the terms of the GNU Affero General Public License as published by the Free
  # Software Foundation (FSF), either version 3 of the License, or (at your
  # option) any later version.
  #
  # This program is distributed in the hope that it will be useful, but WITHOUT
  # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  # FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  # details.
  #
  # You should have received a copy of the Affero GNU General Public License
  # version 3 along with this program. If not, see http://www.gnu.org/licenses/
  
  import essentia.standard
  import tempfile
  import numpy as np
  
  def test_audiofile(filename=None, type='sin440', duration=1):
  
      """Create a dummy wav audio file.
      This can be useful for tests that require loading audio files.
      
      Args:
          filename (string): Filename (default=None). If not specified, a 
              named temporary file will be created. 
          type (string): The type of audio to generate: 'silence' or 'sin440' 
              (default)
          duration (float): duration of audio in seconds (default 1 sec.)
      Returns:
          (string): Name of a temporary audio file
      """
      if type == 'sin440':
          samples = np.sin(2*np.pi*np.arange(44100*duration)*440/44100).astype(np.float32)
      elif type == 'silence':
          samples = [0] * int(44100 * duration)
      else:
          raise (ValueError, 'Wrong audio type:', type)
      
      if not filename:
          tf = tempfile.NamedTemporaryFile(delete=False, suffix=".wav")
          tf.close()
          filename = tf.name
  
      essentia.standard.MonoWriter(filename=filename)(samples)
      return filename
  
subject: Add missing numpy import to pytools.io