Time and frequency representations

stft	Short-time Fourier transform (STFT).
istft	Inverse short-time Fourier transform (ISTFT).
reassigned_spectrogram	Time-frequency reassigned spectrogram.
cqt	Compute the constant-Q transform of an audio signal.
icqt	Compute the inverse constant-Q transform.
hybrid_cqt	Compute the hybrid constant-Q transform of an audio signal.
pseudo_cqt	Compute the pseudo constant-Q transform of an audio signal.
vqt	Compute the variable-Q transform of an audio signal.
iirt	Time-frequency representation using IIR filters
fmt	Fast Mellin transform (FMT)
lpc	Linear Prediction Coefficients via Burg's method
phase_vocoder	Phase vocoder.