An adjustment of the amplitude-frequency response of an audio system or component to accentuate the lower audio frequencies.
"After listening to the After and then the Before, I conclude that you deserve an "attaboy" for this effort. We do not work for bread alone. Thank you for this excellently restored recording. In the recent past, I have made one attempt to repair a few audio files downloaded from the Internet. Even having been formally trained in all required ..."