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2. Surround sound - Wikipedia

   en.wikipedia.org/wiki/Surround_sound

   Surround sound is a technique for enriching the fidelity and depth of sound reproduction by using multiple audio channels from speakers that surround the listener (surround channels). Its first application was in movie theaters .

3. AV receiver - Wikipedia

   en.wikipedia.org/wiki/AV_receiver

   Yamaha 5.1 surround sound system. AV receivers usually provide one or more decoders for sources with more than two channels of audio information. This is most common with movie soundtracks, which use one of a variety of different types of encoding formats. [5] The first common soundtrack format was Dolby Pro Logic, a surround sound processing ...

4. Dolby Pro Logic - Wikipedia

   en.wikipedia.org/wiki/Dolby_Pro_Logic

   Although Dolby Surround was introduced as an analog format, all Dolby Digital decoders incorporate a digitally implemented Dolby Surround Pro Logic decoder for digital stereo signals that carry matrix-encoded Dolby Surround. One of the first was the MSP400 surround sound receiver and amplifier by RCA for their high-end Dimensia brand.

5. The 7 Best Wireless Surround Sound Systems for an Immersive ...

   www.aol.com/lifestyle/best-wireless-surround...

   Best Wireless Surround Sound Systems. Best for Audio Fanatics: Nakamichi Shockwafe Elite. Best Theater Sound: Sony HT-A7000. Best Value: VIZIO M-Series 5.1. Best Upgrade For A Wired System ...

6. Home audio - Wikipedia

   en.wikipedia.org/wiki/Home_audio

   Quadraphonic sound was released in 1970 and never gained much popularity. It was a four-channel reproduction system, which is considered to be the origin of surround sound. It was recorded on phonograph, tape, and a few CDs, and required a quadraphonic player for playback. [5] Surround sound formats became available to consumers in the late 80's.

7. 5.1 surround sound - Wikipedia

   en.wikipedia.org/wiki/5.1_surround_sound

   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] Dolby Digital, Dolby Pro Logic II, DTS, SDDS, and THX are all common 5.1 systems. 5.1 is also the ...