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])