Data visualization

specshow	Display a spectrogram/chromagram/cqt/etc.
waveshow	Visualize a waveform in the time domain.
wavebars	Visualize a waveform as a series of bars representing the amplitude envelope.
wavef0	Visualize a waveform with an f0-displacement.
multiplot	Visualize multiple related waveforms or spectrograms on an array of subplots.