The discrete 4-channel record with its 30 kHz carrier imposed upon each of the walls of the stereo groove is described. A review of progress in each of the several aspects of recording, lacquer cutting, metal parts, electroforming, and manufacturing, is given.

Author: Isom, Warren R.
Affiliation: RCA Records, Indianapolis, IN
AES Convention: 44 (March 1973) Paper Number: G-4
Publication Date: March 1, 1973

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