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70 mm system used six (left, left-center, center, right-center and right, plus a single surround channel). Unfortunately, these magnetic systems were not only very expensive but were also unreliable and so were little used, the industry preferring to stay with the tried, tested, and economical
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type). In addition a matrix, similar in principle to those used for the existing matrix-type quadraphonic systems, allowed the audio for left, center and right speakers, plus a single surround channel to be carried by the two tracks. Thus Dolby Stereo provided a similar stereo performance to that
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option that provides options for dialogue reproduction, as well as the overall content mapped to the center and front channels. Common settings include modes that map dialogue strictly to the center channel (to the best ability of the decoder), modes that emphasize vocals for clear dialogue, and
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modes that mix the center and front channels, mapping some vocals to the front channels, and some non-vocal audio content to the center channel. It may also simply raise the volume level of the center channel.
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In material without accompanying visuals (e.g. music), the center channel simply reproduces sound intended to come from immediately in front of the listener, which usually includes the
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with left and right stereo speakers. The center channel provides image stabling effects and is considered the most important channel for film production.
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in 1975. 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
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previously only available in the cinema by the magnetic tracks on 4-track
Cinemascope or 6-track Todd-AO 70 mm formats, but at far lower cost.
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sound editing, dialogue can be mapped to other speakers when story action and direction require it, such as when the person talking is off-screen.
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experiments in stereo sound from the 1930s, and multi-channel cinema sound systems, starting with the first commercial stereophonic film (
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formats. It is the channel that is mostly, or fully, dedicated to the reproduction of the dialogue of an audiovisual program. The
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providing for not only the usual three screen speakers but also 2 or 4 groups of surround speakers and a sub-woofer.
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if the speakers were not precisely placed. The center channel eliminates the need to create a
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The need for a center speaker to locate screen-centered sounds has been recognized since the
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used four such tracks (left, center, right and surround), and the subsequent
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units, the center channel is positioned above or below the video screen.
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244:"Surround Associates - Specializing in all aspects of surround sound"
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in addition to the traditional left and right surround channels.
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In recent years digital multi-channel sound systems, such as
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25:Center channel in a 5.1 speaker setup shown in red
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215:"THX Home Theater Setup. Speaker Layout.
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181:6.1 channel surround systems such as
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324:February 8,
318:PR Newswire
103:Cinemascope
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68:lead vocals
55:process of
340:Categories
285:2010-04-20
254:2010-04-15
229:2008-11-19
201:References
57:filmmaking
95:Bell Labs
294:cite web
126:Dolby SR
99:Fantasia
156:have a
107:Todd-AO
89:History
51:In the
42:speaker
191:DTS-ES
279:(PDF)
272:(PDF)
167:DTS:X
152:Many
326:2016
300:link
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