Caution

You're reading an old version of this documentation. If you want up-to-date information, please have a look at 0.9.1.

librosa.core.db_to_amplitude

librosa.core.db_to_amplitude(S_db, ref=1.0)

Convert a dB-scaled spectrogram to an amplitude spectrogram.

This effectively inverts amplitude_to_db:

db_to_amplitude(S_db) ~= 10.0**(0.5 * (S_db + log10(ref)/10))

Parameters

S_dbnp.ndarray

dB-scaled spectrogram

ref: number > 0

Optional reference power.

Returns

Snp.ndarray

Linear magnitude spectrogram

Notes

This function caches at level 30.