number and positioning of additional channels. The most common surround sound specification, the ITU's 5.1 standard, calls for 6 speakers: center (C), in front of the listener; left (L) and right (R), at angles of 60°; left surround (LS) and right surround (RS) at angles of 100-120°; and a subwoofer, whose position is not critical.

Fields of application

Though cinema and soundtracks represent the major uses of surround

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