7.1 surround sound
7.1 surround soundis the common name for an eight-channelsurroundaudio system commonly used inhome theatreconfigurations. It adds two additional speakers to the more conventional six-channel (5.1) audio configuration. As with5.1 surround sound,7.1 surround sound positional audio uses the standard front left and right,center,andLFE(subwoofer) speaker configuration. However, whereas a 5.1 surround sound system combines both surround and rear channel effects into two channels (commonly configured in home theatre set-ups as two rear surround speakers), a 7.1 surround system splits the surround and rear channel information into four distinct channels, in which sound effects are directed to left and right surround channels (SLandSR), plus two rear surround channels (SBLandSBR).
In a 7.1 surround sound home theatre set-up, the surround speakers are placed to the side of the listener's position and the rear speakers are placed behind the listener.[1][2]In addition, with the advent ofDolby Pro Logic IIzandDTS Neo:X,7.1 surround sound can also refer to 7.1 surround sound configurations with the addition of two frontheight channels(LHandRH) positioned above the front channels or two front wide channels positioned between the front and surround channels.[3][4]
History
[edit]Home entertainment
[edit]TheBlu-ray Discand theHD DVDhome video formats provide up to eight channels oflosslessDTS-HD Master Audio,Dolby TrueHDor uncompressedLPCMaudio at 96/48 kHz 24/16-bit, orlossyDolby Digital Plusup to 48 kHz at 1024 kilobytes per second.
Cinema
[edit]While some movies have been remixed to 7.1 audio tracks on Blu-ray Discs for home cinema,[5]the first discrete theatrical 7.1 soundtrack wasToy Story 3in 2010,[6]followed byStep Up 3D.Disneyannounced that they will use 7.1 surround for their future 3D releases.[citation needed]Recent titles includeMegamind,Tangled,Tron: Legacy,Gnomeo and Juliet,Mars Needs Moms,Gulliver's TravelsandThe Chronicles of Narnia: The Voyage of the Dawn Treader.[7]In 2011, additional movies were released with theatrical 7.1 audio, includingThor,Pirates of the Caribbean: On Stranger Tides,Kung Fu Panda 2,Super 8,Green Lantern,Cars 2,Transformers: Dark of the Moon,Captain America: The First Avenger.In 2012,Pizza,a Tamil film was released with this theatrical 7.1 audio. All these titles are exhibited in theDolby Surround 7.1theatrical format.[8] 7-1-surround-sound
Music
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The history ofelectronic musicincludes the evolution of multi-channel playback in concert (arguably the real roots of "surround sound" for cinema) and for a considerable time the 8-channel format was a de facto standard. This standardisation was fostered, in great measure, by the development of professional and semi-professional 8-track tape recorders—originallyanalog,but later manifesting in proprietary cassette formats byAlesisandTascam.The speaker configuration, however, is much less traditional, and unlike cinematic reproduction systems, there is no hard-and-fast "standard". In fact, composers took (and to some extent still take) considerable interest in experimenting with speaker layouts. In these experiments, the goal is not limited to creating "realistic" playback of believably natural sonic environments. Rather, the goals are often simply to experience and understand thepsychoacousticseffect created by variations on source and imaging.
Some of the first live concerts to appear wereChris Botti in Bostonin 2009 andSatchuratedin 2012.
See also
[edit]
References
[edit]- ^"5.1 vs 7.1 Channel Home Theater Receivers - Which is Right For You?".Retrieved2012-06-04.
- ^"Help Guide | Installing 7.1-channel speaker system using surround back speakers".helpguide.sony.net.Retrieved2023-06-12.
- ^"Dolby Pro Logic IIz".Dolby Laboratories.Archived fromthe originalon 2011-09-26.Retrieved2011-10-07.
- ^"Help Guide | Names and functions of speakers".helpguide.sony.net.Retrieved2023-06-12.
- ^"7.1 Blu-ray".Blu-rayStats.Retrieved2011-05-22.
- ^Flinn, Ryan (2010-03-23)."Pixar Gets Dolby to Invent 'Rain of Sound' Technology to Match 3-D Movies".Bloomberg.Retrieved2011-05-22.
- ^"Dolby Marks 40 Years in Cinema with Major Digital Cinema Milestones".Dolby Laboratories.2010-11-10. Archived fromthe originalon 2011-07-10.Retrieved2011-05-22.
- ^Giardina, Carolyn (2011-03-28)."'Pirates of the Caribbean,' 'Kung Fu Panda 2' to Use Dolby 7.1 Surround Sound ".The Hollywood Reporter.Archivedfrom the original on 30 March 2011.Retrieved2011-03-29.