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Quadraphonic sound was a commercial failure when first introduced due to a variety of technical issues and format incompatibilities. Four channel audio formats can be more expensive to produce than standard two-channel stereo. Playback requires additional speakers and amplifier channels. It may also require specially designed decoding equipment.
Dynaquad. Dynaquad, or DY, was a matrix decoder 4-channel quadraphonic sound system developed by Dynaco in 1969. [1][2][3] The system originally had four speakers that were arranged in a diamond shape (centre-front, centre-left, centre-rear, centre-right). [4][5] Initially (first available in 1969 with th Dynaco SCA-80Q amplifier [6]), it was ...
Multichannel Television Sound. Multichannel Television Sound (MTS) is the method of encoding three additional audio channels into analog 4.5 MHz audio carriers on System M and System N. It was developed by the Broadcast Television Systems Committee, an industry group, and sometimes known as BTSC as a result.
JVC, RCA. Usage. Audio storage. Released. 1972. 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 [1] and introduced in May 1972. Hundreds of recordings using this technology were ...
Matrix decoding is an audio technology where a small number of discrete audio channels (e.g., 2) are decoded into a larger number of channels on play back (e.g., 5). The channels are generally, but not always, arranged for transmission or recording by an encoder, and decoded for playback by a decoder. The function is to allow multichannel audio ...
Stereo-4. Stereo-4, also known as EV (from Electro-Voice) or EV-4, was a matrix 4-channel quadraphonic sound system developed in 1970 by Leonard Feldman and Jon Fixler. [1] The system was heavily promoted by RadioShack stores in the United States, and some record companies released LP albums encoded in this format.
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