cqt#
- diffsptk.CQT#
alias of
ConstantQTransform
- class diffsptk.ConstantQTransform(frame_period, sample_rate, *, f_min=32.7, n_bin=84, n_bin_per_octave=12, tuning=0, filter_scale=1, norm=1, sparsity=0.01, window='hann', scale=True, res_type='kaiser_best', **kwargs)[source]#
Perform constant-Q transform based on the librosa implementation.
- Parameters:
- frame_periodint >= 1
Frame period in samples, \(P\).
- sample_rateint >= 1
Sample rate in Hz.
- f_minfloat > 0
Minimum center frequency in Hz.
- n_binint >= 1
Number of CQ-bins, \(K\).
- n_bin_per_octaveint >= 1
number of bins per octave, \(B\).
- tuningfloat
Tuning offset in fractions of a bin.
- filter_scalefloat > 0
Filter scale factor.
- normfloat
Type of norm used in basis function normalization.
- sparsityfloat in [0, 1)
Sparsification factor.
- windowstr
Window function for the basis.
- scalebool
If True, scale the CQT response by the length of filter.
- res_type[‘kaiser_best’, ‘kaiser_fast’] or None
Resampling type.
- **kwargsadditional keyword arguments