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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 ..."

Microgroove

A groove of which the unmodulated width at the top is less than 0076 mm and which is intended to be played with a stylus having a tip radius less than 0025 mm.