This minor revision includes mainly bug fixes, but there are a few new features as well.

Optimize the following method :

• Spectrogram

  • linear_spectrogram
  • mel_spectrogram
  • bark_spectrogram
  • erb_spectrogram
  • cqt
  • vqt

• Cepstral coefficients

  • mfcc
  • bfcc
  • gtcc
  • cqcc

  Adjustment of some parameter default values.