photo emulsion, exposed to laser, then etched in chemical bath leaving pits in a spiral groove. The CD rotated at variable speeds of 200 rpm near the edge to 500 rpm near the centre. The size would be 12cm (5 inches), use 16-bit encoding and a sampling frequency of 44,100 per second. The maximum playing time would be | | |Mitsubishi, Hitachi & Sony show digital audio | |disc prototypes at the Tokyo Audio Fair. | |JVC Develops Digital…
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