The booklet explains JVC's CD-4 system, a fully discrete 4‑channel recording and playback technology that keeps each channel separate from recording to playback. It describes why four channels are needed for true three‑dimensional sound and how the system overcomes the limitations of matrix approaches.
Technical details cover the use of a frequency‑modulated carrier, a Phase‑Locked Loop demodulator, and the Automatic Noise Reduction System (ANRS) that together provide high‑fidelity, compatible playback on standard 2‑channel or mono equipment.