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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 .
The Yamaha DSP-1 is a processor of early home theater surround sound equipment, produced in 1986. [1] The DSP-1 (referred to by Yamaha as a Digital Soundfield Processor) allowed owners to synthesize up to 6-channels of surround sound from 2 channel stereo sound via a complex digital signal processor (DSP).
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 ...
Each audio track can be assigned to an audio channel, the conventional format for distribution, or to an audio "object". Dolby Atmos in theaters has a 9.1 (commonly referred to as 7.1.2) channel-based "bed" channels for ambience stems or center dialogue, leaving 118 tracks for objects. [ 16 ]
Dolby Surround Pro Logic is the full name that refers to the matrix surround format and decoding system in one. When a Dolby Surround soundtrack is created in post-production ( Dolby MP Matrix ), four channels of sound are matrix-encoded into an ordinary stereo (two-channel) soundtrack.
DTS-HD MA is the encoding format for DTS:X, an object-based surround-sound format that competes with Dolby Atmos. A DTS-HD MA bitstream carrying DTS:X can contain up to 9 simultaneous sound objects, which are dynamically mapped to a user's speaker system during playback, unlike the rigid number and placement of speakers required by channel ...
A comparison of the outputs of Yamaha's YMF262 and YMF289 FM sound chips. 0:00 is YMF262, and 0:31 onward is YMF289. In 1995, Yamaha produced a fully compatible, low-power variant of the YMF262 called the YMF289 (OPL3-L), targeting PCMCIA sound cards and laptop computers. [ 12 ]
This is part of the design for Tomlinson Holman's 10.2 surround sound. For movies surround channel information is usually more diffuse ambient noise. Some surround sound systems such as Dolby Digital EX and Pro Logic IIx incorporate a third (back surround) or even fourth surround channel (back left and back right). These channels are matrixed ...