librosa.core.cqt_frequencies¶

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

Compute the center frequencies of Constant-Q bins.

Parameters:	n_bins : int > 0 [scalar] Number of constant-Q bins fmin : float > 0 [scalar] Minimum frequency bins_per_octave : int > 0 [scalar] Number of bins per octave tuning : float in [-0.5, +0.5) Deviation from A440 tuning in fractional bins (cents)
Returns:	frequencies : np.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])