197567 ⎘
Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor Devices for controlling sound, e.g. using acoustical impedances, using valves
ESTIMATION AND CORRECTION OF ECCENTRIC PHONOGRAPH RECORD PLAYBACK IN DIGITAL AUDIO RECORDINGS
#2Method of tracking record player stylus elapsed play time for quality and maintenance and stylus playtime chronograph for implementing the same
#3Record player
#4Record player