It would be nice to make [https://librosa.org/doc/latest/generated/librosa.display.waveshow.html](harmonic/percussive waveforms) (in addition to the spectrograms currently implemented).

y_harm, y_perc = librosa.effects.hpss(y)
librosa.display.waveshow(y_harm, sr=sr, alpha=0.5, label='Harmonic')
librosa.display.waveshow(y_perc, sr=sr, color='r', alpha=0.5, label='Percussive')