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_db : np.ndarray

dB-scaled spectrogram

ref: number > 0

Optional reference power.

Returns:

S : np.ndarray

Linear magnitude spectrogram

Notes

This function caches at level 30.