Rhythm features

tempo	Estimate the tempo (beats per minute)
tempogram	Compute the tempogram: local autocorrelation of the onset strength envelope.
fourier_tempogram	Compute the Fourier tempogram: the short-time Fourier transform of the onset strength envelope.
hybrid_tempogram	Compute a hybrid tempogram.
tempogram_ratio	Tempogram ratio features, also known as spectral rhythm patterns.
metrogram	Metrogram Transform.