LOGIC 7 technology is a proprietary suite of surround algorithms developed and introduced by Lexicon.

LOGIC 7 technology is used for recording and distributing multi-channel sound on two channel media. It uses psychoacoustic techniques to restore the original channel separation with very little change in sound. LOGIC 7 technology offers a universal multi-channel sound solution.

It plays normal stereo recordings in full and satisfying surround, with a wide sound stage and increased envelopment, while standing ready to play encoded material in full surround. Multi-channel recordings encoded with LOGIC 7 technology, play in every system capable of handling two-channel material, and can be broadcast with standard equipment. LOGIC 7 encoders and decoders are available now from Lexicon, and integrated receivers that include LOGIC 7 technology are on the market today. An integrated decoder chip is also available.