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You're reading the documentation for a development version. For the latest released version, please have a look at 0.9.1.

librosa.hz_to_midi

librosa.hz_to_midi(frequencies)[source]

Get MIDI note number(s) for given frequencies

Parameters
frequenciesfloat or np.ndarray [shape=(n,), dtype=float]

frequencies to convert

Returns
note_numsnumber or np.ndarray [shape=(n,), dtype=float]

MIDI notes to frequencies

See also

midi_to_hz
note_to_midi
hz_to_note

Examples

>>> librosa.hz_to_midi(60)
34.506
>>> librosa.hz_to_midi([110, 220, 440])
array([ 45.,  57.,  69.])