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3 front channels + 2 rear channels + 3 channels reproduced in the rear in total + 1 LFE channel = 3/2:3.1 The term stereo, although popularised in reference to two channel audio, historically also referred to surround sound, as it strictly means "solid" (three-dimensional) sound. However this is no longer common usage and "stereo sound" almost ...
The first 2.1 AV receiver system from Bose was the "Freestyle", which was introduced in 2002 and used S/PDIF and RCA inputs. The system used the same speakers as the 3-2-1. [9] The Freestyle was replaced by the "CineMate" in 2005, which has only RCA connectors and uses the same speakers as the 321 Series II. [10]
Dolby AC-4 is an audio compression standard supporting multiple audio channels and/or audio objects. Support for 5.1 channel audio is mandatory and additional channels up to 7.1.4 are optional. [38] AC-4 provides a 50% reduction in bit rate over AC-3/Dolby Digital Plus. [38]
The "Companion 2 Series II" were introduced in 2006. [5] The appearance changed from round speaker grilles to rectangular speaker grilles. Compared with the similarly priced M-Audio Studiophile AV20, the Companion 2 speakers were found to have inferior sound quality but the benefit of being able to play two sources simultaneously. [6]
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]
Dolby Surround/Dolby Pro Logic/Dolby Pro Logic II. Dolby Pro Logic is a surround sound processing technology developed by Dolby Laboratories, designed to decode soundtracks encoded with Dolby Surround. The terms Dolby Stereo and LtRt (Left Total, Right Total) are also used to describe soundtracks that are encoded using this technique.
E-AC3. v. t. e. Dolby Digital Plus, also known as Enhanced AC-3 (and commonly abbreviated as DDP, DD+, E-AC-3 or EC-3), is a digital audio compression scheme developed by Dolby Labs for the transport and storage of multi-channel digital audio. It is a successor to Dolby Digital (AC-3), and has a number of improvements over that codec, including ...
Dolby TrueHD. Dolby TrueHD logo as introduced in 2012. Dolby TrueHD is a lossless, multi-channel audio codec developed by Dolby Laboratories for home video, used principally in Blu-ray Disc and compatible hardware. Dolby TrueHD, along with Dolby Digital Plus (E-AC-3) and Dolby AC-4, is one of the intended successors to the Dolby Digital (AC-3 ...
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