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Compatible Discrete 4

Compatible Discrete 4, also known as Quadradisc or CD-4 (not to be confused with compact disc) was a discrete four-channel quadraphonic system for phonograph records. The system was created by JVC and RCA in 1971 and introduced in May 1972. Hundreds of recordings using this technology were released on LP during the 1970s.

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Capacity
Four audio channels
Developed by
JVC, RCA
Encoding
Analog signal
Media type
Phonograph record
Read mechanism
phono cartridge
Released
1972

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Overview

Equipment

Operation

Quadracast

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Compatible Discrete 4

Nodes44
Edges43
Triples8
Avg. degree1.95
Density0.045455
Components1

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Compatible Discrete 4

Top relations

Capacity · 1
Compatible Discrete 4 → Four audio channels
Developed by · 1
Compatible Discrete 4 → JVC, RCA
Encoding · 1
Compatible Discrete 4 → Analog signal
Media type · 1
Compatible Discrete 4 → Phonograph record
Read mechanism · 1
Compatible Discrete 4 → phono cartridge
Released · 1
Compatible Discrete 4 → 1972
Usage · 1
Compatible Discrete 4 → Audio storage

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Important terminology

stereo cd-4 quadraphonic system channels audio record discrete carrier phonograph signals records compatible four phono also frequency range introduced major

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Compatible Discrete 4CapacityFour audio channels1.00infobox
Compatible Discrete 4Developed byJVC, RCA1.00infobox
Compatible Discrete 4EncodingAnalog signal1.00infobox
Compatible Discrete 4Media typePhonograph record1.00infobox
Compatible Discrete 4Read mechanismphono cartridge1.00infobox
Compatible Discrete 4Released19721.00infobox
Compatible Discrete 4UsageAudio storage1.00infobox
Stereo Quadraphonicinstance ofThere is no intermingling of channels as is done in matrix decoder 4-channel systems0.80text

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