librosa.cqt_frequencies¶

librosa.cqt_frequencies(n_bins, *, fmin, bins_per_octave=12, tuning=0.0)[source]¶

Compute the center frequencies of Constant-Q bins.

Parameters

n_binsint > 0 [scalar]: Number of constant-Q bins
fminfloat > 0 [scalar]: Minimum frequency
bins_per_octaveint > 0 [scalar]: Number of bins per octave
tuningfloat: Deviation from A440 tuning in fractional bins

Returns

frequenciesnp.ndarray [shape=(n_bins,)]: Center frequency for each CQT bin

Examples

>>> # Get the CQT frequencies for 24 notes, starting at C2
>>> librosa.cqt_frequencies(24, fmin=librosa.note_to_hz('C2'))
array([  65.406,   69.296,   73.416,   77.782,   82.407,   87.307,
         92.499,   97.999,  103.826,  110.   ,  116.541,  123.471,
        130.813,  138.591,  146.832,  155.563,  164.814,  174.614,
        184.997,  195.998,  207.652,  220.   ,  233.082,  246.942])