Caution

You're reading an old version of this documentation. If you want up-to-date information, please have a look at 0.9.1.

Filters

Filter bank construction

mel(sr, n_fft[, n_mels, fmin, fmax, htk, ...])	Create a Mel filter-bank.
chroma(sr, n_fft[, n_chroma, tuning, ...])	Create a chroma filter bank.
constant_q(sr[, fmin, n_bins, ...])	Construct a constant-Q basis.
semitone_filterbank([center_freqs, tuning, ...])	Construct a multi-rate bank of infinite-impulse response (IIR) band-pass filters at user-defined center frequencies and sample rates.

Window functions

window_bandwidth(window[, n])	Get the equivalent noise bandwidth of a window function.
get_window(window, Nx[, fftbins])	Compute a window function.

Miscellaneous

constant_q_lengths(sr, fmin[, n_bins, ...])	Return length of each filter in a constant-Q basis.
cq_to_chroma(n_input[, bins_per_octave, ...])	Construct a linear transformation matrix to map Constant-Q bins onto chroma bins (i.e., pitch classes).
mr_frequencies(tuning)	Helper function for generating center frequency and sample rate pairs.
window_sumsquare(window, n_frames[, ...])	Compute the sum-square envelope of a window function at a given hop length.
diagonal_filter(window, n[, slope, angle, ...])	Build a two-dimensional diagonal filter.