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- Surround sound - Multichannel audio is the name for a variety of techniques for expanding and enriching the sound of audio playback by recording additional sound channels that can be reproduced on additional speakers. Surround sound refers to the application of multichannel audio to channels "surrounding" the audience (generally some combination of left surround, right surround, and back surround) as opposed to "screen channels" (center, [front] left, and [front] right).
- Grammy Award for Best Surround Sound Album - The Grammy Award for "Best Surround Sound Album" was first awarded in 2005, as the first category in a new "Surround Sound" field.
- Surround Sound Test CD - A surround sound test CD usually refers to a compact disc containing audible test tones such as sine waves. The specialized disc is used to calibrate (align) surround systems.
- XM HD Surround - On December 28 2005, XM Satellite Radio announced that it had teamed up with Neural Audio to introduce XM HD Surround, which will broadcast XM channels in 5.1 digital surround sound.
- Dolby Pro Logic - Dolby Pro Logic is a surround sound processing technology designed to decode soundtracks encoded with Dolby Surround. Dolby Surround Stereo was originally developed by Dolby Laboratories in 1976 for analog cinema sound systems.