A pulse-code-modulation tape recorder for eight channels of audio information is described. The sampling rate for each channel is 47.25 kHz, and the channel samples are interleaved in 13-bit code plus parity and phase check bits for each, with three eight-channel blocks in a television-signal horizontal-scanning-line format. A studio-quality video tape recorder is used. Engineering quality considerations are explained and performance data are given. Applications to the mastering of disc records of unprecedented fidelity are indicated.
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