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Typical layout of loudspeakers in a 5.1 home theater loudspeaker system. Block diagram of a 5.1 channel bass management system, with nominal filtering characteristics. There are notation differences between the pre-bass-managed signal and after it has passed through the bass manager. For example, when using 5.1 surround sound: [2] [3]
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 ]
7.1.2 and 7.1.4 immersive sound along with 5.1.2 and 5.1.4 format adds either 2 or 4 overhead speakers to enable sound objects and special effect sounds to be panned overhead for the listener. Introduced for theatrical film releases in 2012 by Dolby Laboratories under the trademark name Dolby Atmos .
It divided the existing soundtrack area of a 35 mm film print into two, allowing a two-channel recording. Each of these two channels used Dolby A-type noise reduction (later replaced by Dolby SR type). In addition a matrix, similar in principle to those used for the existing matrix-type quadraphonic systems, allowed the audio for left, center ...
[1] [2] In addition, with the advent of Dolby Pro Logic IIz and DTS Neo:X, 7.1 surround sound can also refer to 7.1 surround sound configurations with the addition of two front height channels (LH and RH) positioned above the front channels or two front wide channels positioned between the front and surround channels.
Each object specifies its apparent source location in the theater as a set of three-dimensional rectangular coordinates relative to the defined audio channel locations and theater boundaries. [19] Dolby Atmos home theaters can be built upon conventional 5.1 and 7.1 layouts. For Dolby Atmos, the nomenclature differs slightly by an additional ...