librosa.core.db_to_power

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

Convert a dB-scale spectrogram to a power spectrogram.

This effectively inverts power_to_db:

db_to_power(S_db) ~= ref * 10.0**(S_db / 10)

Parameters:

S_db : np.ndarray

dB-scaled spectrogram

ref : number > 0

Reference power: output will be scaled by this value

Returns:

S : np.ndarray

Power spectrogram

Notes

This function caches at level 30.