Spectral features

chroma_stft	Compute a chromagram from a waveform or power spectrogram.
chroma_cqt	Constant-Q chromagram
chroma_cens	Compute the chroma variant "Chroma Energy Normalized" (CENS)
chroma_vqt	Variable-Q chromagram
tonnetz	Compute the tonal centroid features (tonnetz)
melspectrogram	Compute a mel-scaled spectrogram.
mfcc	Mel-frequency cepstral coefficients (MFCCs)
spectral_centroid	Compute the spectral centroid.
spectral_bandwidth	Compute p'th-order spectral bandwidth.
spectral_contrast	Compute spectral contrast
spectral_flatness	Compute spectral flatness
spectral_rolloff	Compute roll-off frequency.
poly_features	Get coefficients of fitting an nth-order polynomial to the columns of a spectrogram.
rms	Compute root-mean-square (RMS) value for each frame.
zero_crossing_rate	Compute the zero-crossing rate of an audio time series.