Ultra Stereo

Ultra Stereo, stylized as ULTRA★STEREO, is a cinema sound system that was developed in 1984 by chief engineer Jack Cashin.

Ultra Stereo
Product typeSound format
Surround sound
OwnerUltra Stereo Labs
CountryUnited States
Introduced1984
MarketsWorldwide

It was a 4/2/4 photographic sound encoding and decoding procedure compatible with (and using the same technical basic structure, with identical sound quality as) its competitor Dolby Stereo Matrix.

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