Spectrogram decomposition

librosa.decompose provides functions to decompose a feature matrix or spectrogram into components.

This includes harmonic-percussive source separation (HPSS), nearest-neighbor filtering, and general matrix decomposition (e.g. NMF).

hpss	Median-filtering harmonic percussive source separation (HPSS).
nn_filter	Filter by nearest-neighbor aggregation.
decompose	Decompose a feature matrix.