7.1 Surround Sound Samples
Dolby Surround 7.1 adds two discrete channels of sound to increase the realism of all types of movies.
5.1 surround sound ('five-point one') is the common name for six channel surround sound audio systems. 5.1 is the most commonly used layout in home theatre.[citation needed] It uses five full bandwidth channels and one low-frequency effects channel (the 'point one').[1]Dolby Digital, Dolby Pro Logic II, DTS, SDDS, and THX are all common 5.1 systems. 5.1 is also the standard surround sound audio component of digital broadcast and music.[2]
All 5.1 systems use the same speaker channels and configuration, having a front left and right, a center channel, two surround channels and the low-frequency effects channel designed for a subwoofer.
- 2Application
History[edit]
A prototype for five-channel surround sound, then dubbed 'quintaphonic sound', was used in the 1975 film Tommy.[3]
5.1 dates back to 1976[citation needed] when Dolby Labs modified the track usage of the six analogue magnetic soundtracks on Todd-AO 70 mm film prints. The Dolby application of optical matrix encoding in 1976 (released on the film, Logan's Run) did not use split surrounds, and thus was not 5.1. Dolby first used split surrounds with 70mm film, notably in 1979 with Apocalypse Now. Instead of the five screen channels and one surround channel of the Todd-AO format, Dolby Stereo 70 mm Six Track provided three screen channels, two high-passed surround channels and a low-frequency surround channel monophonically blended with the two surround channels.
When digital sound was applied to 35 mm release prints, with Batman Returns in 1992, the 5.1 layout was adopted. The ability to provide 5.1 sound had been one of the key reasons for using 70 mm for prestige screenings. The provision of 5.1 digital sound on 35 mm significantly reduced the use of the very expensive 70 mm format. Digital sound and the 5.1 format were introduced in 1990, by KODAK and Optical Radiation Corporation, with releases of Days of Thunder and The Doors using the CDS (Cinema Digital Sound) format.
5.1 digital surround, in the forms of Dolby Digital AC3 and DTS, started appearing on several mid 90s Laserdisc releases, with among the earliest being Clear and Present Danger and Jurassic Park (the latter having both AC3 and DTS versions). Many DVD releases have Dolby Digital tracks up to 5.1 channels, due to the implementation of Dolby Digital in the development of the DVD format. In addition, some DVDs have DTS tracks with most being 5.1 channel mixes (a few releases, however, have 6.1 “matrixed” tracks). Blu-ray and digital cinema both have eight-channel capability which can be used to provide either 5.1 or 7.1 surround sound. 7.1 is an extension of 5.1 that uses four surround zones: two at the sides and two at the back.
A system of digital 5.1 surround sound has also been used in 1987 at the Parisian cabaret the Moulin Rouge, created by French engineer Dominique Bertrand. To achieve such a system in 1985 a dedicated mixing console had to be designed in cooperation with Solid State Logic, based on their 5000 series, and dedicated speakers in cooperation with APG.[4] 2017 new songs mp3 download. The console included ABCDEF channels. Respectively: A left, B right, C centre, D left rear, E right rear, F bass. The same engineer had already developed a similar 3.1 system in 1973, for use at the official International Summit of Francophone States in Dakar.
7.1 Surround Sound Speakers For Pc
Application[edit]
Channel order[edit]
The order of channels in a 5.1 file is different across file formats. The order in WAV files is (not complete) Front Left, Front Right, Center, Low-frequency effects, Surround Left, Surround Right.[5]
Music[edit]
Regarding music, the main goal of 5.1 surround sound is a proper localization and equability of all acoustic sources for a centered positioned audience. Therefore, ideally five matched speakers should be used.
For play-back of 5.1 music recommendations of the International Telecommunication Union (ITU) have been released and propose the following configuration (ITU-R BS 775):[6]
- five speakers of the same size for front, center and surround
- identical distance from the listeners for all five speakers
- angle adjustment regarding viewing direction of audience: center 0°, front ±22.5° for movies ±30° for music, surround ±110°
See also[edit]
References[edit]
- ^'Understanding Surround Sound Formats'. Crutchfield.com. 23 September 2009. Retrieved 7 March 2011.
- ^'What is 5.1'. Archived from the original on 17 March 2012.
- ^Mosely, John (January 1977). 'Quintaphonic Sound'. Journal of the SMPTE. l86.
- ^'Recherche & Développement'. Archived from the original on 3 August 2008. Retrieved 17 December 2015.
- ^'Multiple channel audio data and WAVE files'. Retrieved 19 November 2015.
- ^Thomas Lund (1 September 2000), Enhanced Localization in 5.1 Production, Audio Engineering Society, retrieved 19 November 2015
5.1 Surround Sound vs. 7.1 Surround Sound – What’s the Difference?
One question we are asked often is, what is the difference between 5.1 surround sound vs. 7.1 surround sound? Let’s explore the differences between the two systems, both of which are great solutions to adding surround sound to your home.
5.1 Surround Sound System Overview
A 5.1 Surround Sound system includes the following equipment.
5 total speakers:
- A pair in the front – one left speaker and one right speaker. These are typically in-wall speakers. The front speakers are primarily used for music and sound effects.
- A center channel, which is the most important speaker you could have because it produces about 90% of the dialogue (sound). As the name of this speaker alludes to, it sits on the center of the console (or in-wall) since it produces the majority of the sound output.
- A pair of surround (sides) – one left surround speaker and one right surround speaker, installed on the sides of the room (hence the name surround sound). The surround speakers are primarily used for music and sound effects, same as the front speakers.
7.1 Surround Sound Samples
A sub-woofer, which typically sits in the corner of room (back or front). The sub-woofer produces the low-frequency effects (LFE), which is most commonly known as the deep, base sounds coming from the show/movie being watched. The best location for the sub-woofer is corner of the room,as it helps to reverberate the sound.
A receiver, which all components are connected to for running the system. Any basic receiver manufactured will support a 5.1 surround sound system.
All network TV stations are broadcast in 5.1, so anything produced for televsision will have the ability to be played through a 5.1 surround sound system.
7.1 Surround Sound System Overview
7.1 Surround Sound System
With a 7.1 surround sound system, there are 7 total speakers. The system is the same as the 5.1 system listed previously, with an additional two speakers.
The additional speakers are installed as two rear speakers, making it a 7.1 system (7 total speakers, 1 sub-woofer). This gives you a wider range of effects. The effects/sound coming from the surround (side) speakers, are the same effects/sounds that come through the rear speakers. Essentially, giving you a greater field of depth for those effects and sounds.
If you want to hear more base, then good news. You can add a second sub-woofer to a 7.1 system, and as a result, making it a 7.2 system (7 speakers, 2 subs).
The receiver for a 7.1 surround sound system will need to be different than the 5.1 system. The receiver will need to have inputs for 7 speakers. If you opt for a 7.2 system (2 subs), be sure to get a receiver that supports 7 speakers and 2 subs.
For a visual on the difference between a 5.1 surround sound vs. 7.1 surround sound system, check out this Dolby Labs link.
Both systems can be installed in a family room or media room. If you want to go really big with your speaker system, you can upgrade to Dolby Atmos 7.1.2 or Dolby Atmos 7.1.4. These put out some serious sound!
7.1 Surround Sound Sample Mp3
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