Caution

You're reading the documentation for a development version. For the latest released version, 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.
`wavelet`(*, freqs[, sr, window, ...])	Construct a wavelet basis using windowed complex sinusoids.
`semitone_filterbank`(*[, center_freqs, ...])	Construct a multi-rate bank of infinite-impulse response (IIR) band-pass filters at user-defined center frequencies and sample rates.

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

`wavelet_lengths`(*, freqs[, sr, window, ...])	Return length of each filter in a wavelet 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, ...])	Build a two-dimensional diagonal filter.

`constant_q`(*, sr[, fmin, n_bins, ...])	Construct a constant-Q basis.
`constant_q_lengths`(*, sr, fmin[, n_bins, ...])	Return length of each filter in a constant-Q basis.