Pitch and tuning

pyin	Fundamental frequency (F0) estimation using probabilistic YIN (pYIN).
yin	Fundamental frequency (F0) estimation using the YIN algorithm.
estimate_tuning	Estimate the tuning of an audio time series or spectrogram input.
pitch_tuning	Given a collection of pitches, estimate its tuning offset relative to A440=440.0Hz.
piptrack	Pitch tracking on thresholded parabolically-interpolated STFT.