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2. 5.1 surround sound - Wikipedia

   en.wikipedia.org/wiki/5.1_surround_sound

   The left and right surround speakers in the bottom line create the surround sound effect. 5.1 surround sound ("five-point one") is the common name for surround sound audio systems. 5.1 is the most commonly used layout in home theatres. [1] It uses five full-bandwidth channels and one low-frequency effects channel (the "point one"). [2]

3. Surround sound - Wikipedia

   en.wikipedia.org/wiki/Surround_sound

   7.1 channel surround is another setup, most commonly used in large cinemas, that is compatible with 5.1 surround, though it is not stated in the ITU-standards. 7.1 channel surround adds two additional channels, center-left (CL) and center-right (CR) to the 5.1 surround setup, with the speakers situated 15 degrees off centre from the listener. [24]

4. Dolby Digital - Wikipedia

   en.wikipedia.org/wiki/Dolby_Digital

   It converts any audio signals on a PC or game console into a 5.1-channel 16-bit/48 kHz Dolby Digital format at 640 kbit/s and transports it via a single S/PDIF cable. [27] A similar technology known as DTS Connect is available from competitor DTS .

5. Dolby Atmos - Wikipedia

   en.wikipedia.org/wiki/Dolby_Atmos

   The initial cinema Atmos systems used in-ceiling speakers, then upward-firing speakers (e.g. for soundbars) were introduced as an alternative for consumer products. [3] Atmos is also used on some devices that do not have a height channel, such as headphones, televisions, mobile phones, and tablets. [4] [5] [6]

6. Sound Blaster Live! - Wikipedia

   en.wikipedia.org/wiki/Sound_Blaster_Live!

   Later versions of the Live!, usually called Live! 5.1, offered 5.1-channel support which adds a center-channel speaker and LFE subwoofer output, most useful for movie watching where Dolby Digital 5.1 is decoded. The Live! implemented DOS legacy support via Ensoniq's AudioPCI DOS TSR program. Creative acquired Ensoniq in 1998 and, as part of the ...

7. Dolby - Wikipedia

   en.wikipedia.org/wiki/Dolby

   Dolby Digital EX: introduces a matrix-encoded center rear surround channel to Dolby Digital for 6.1 channel output. [24] This center-rear channel is often split to two rear back speakers for 7.1 channel output. Dolby Digital Plus (also known as E-AC-3) is a lossy audio codec based on Dolby Digital that is backward compatible, but more advanced.