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NRG Acoustics A-70: Multichannel audio
Multi channel audio is a way of enhancing the sound processing high quality of any audio source with additional audio channels from speakers that surround the audience (surround channels), providing sound with a 360 radius within the horizontal plane (2D) contrary to "screen channels" (centre, [front] left, and [front] right) coming from only within the listener's frontward arc.
Surround sound is portrayed by a listener position or sweet spot in which the audio effects work most effectively, and features a fixed or forward perspective of the sound field to the listener as of this location. The procedure improves the notion of sound spatialization by using sound localization; a listener's capability to identify the location or origin of a detected sound in path and distance. Typically this is achieved with the use of multiple discrete audio channels routed to an array of loudspeakers.
There are numerous multichannel surround sound based models and techniques, ranging in reproduction and saving methods combined with the amount and positioning more stations.
NRG Acoustics HJ-17: Areas of use
Though cinema and soundtracks signify the foremost uses of surround solutions, its scope of use is much wider than that as multichannel audio enables creation of an audio-environment for all variations of purposes. Multichannel surround sound techniques are useful to recreate contents as varied as music, conversation, synthetic or natural sounds for cinema, television, broadcasting, or pcs. With regard to music material to illustrate, a live performance could use multichannel approaches to the context connected with an open-air show, of an musical theatre or perhaps broadcasting; for a film particular techniques are tailored to movie theater, or to residence (e.g. home cinema systems).
The narrative place is also a content which could be enhanced through multichannel approaches. This is applicable mainly to cinema narratives, such as the talk of the characters of a film, but will even be applied to plays for theatre, to a seminar, or to blend voice-based comments in an archeological site or monument. As an example, an exhibit could very well be enhanced with topical ambient sound of water, wild birds, train or machine noise. Topical natural sounds could also be used in educational programs.
NRG Acoustics SG-4 - Alternative fields of application include video gaming units, personal computers and other platforms.
In such applications, the material would typically be synthetic noise maded by the computer system in interaction with its user. Substantial work has also been done using multichannel for enhanced situation knowledge in government and general population safety purposes.
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