(Pronounced “five-point-one”) (n.)The digital audio multichannel format used to encode digital soundtracks for film, DVD, and HDTV. It refers to five discrete, full bandwidth (20-20 kHz) channels. These five are left front, right front, center front, left surround, and right surround. The “.1” usually refers to a limited bandwidth (20–120 Hz) subwoofer channel, but it may also refer to a special effects channel. The term is used by Dolby Digital and also by DTS Zeta Digital to describe the home version of their Coherent Acoustics system for theaters.
5.1 surround sound
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