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"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 ..."

Energy conversion

The process of changing a signal from one form of energy to another, as in a loudspeaker, which converts electrical energy into acoustical energy.