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Topic: Multichannel audio

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	Multichannel - Wikipedia, the free encyclopedia
		It has been suggested that this article or section be merged with Multichannel audio.
		The most usual multichannel setups are 5.1 (five main channels: front center, front right, front left, rear right, rear left and one Low Frequency Extension channel) and 6.1 (the five channels from 5.1 + back center).
		Multichannel recordings are often referred to as "Surround".
	en.wikipedia.org /wiki/Multichannel (171 words)

	Multichannel audio - Wikipedia, the free encyclopedia
		Multichannel audio refers to the use of multiple sound sources to create a richer, or live music experience.
		As opposed to mono and stereo (two channel sound), multichannel audio has become popular with the advent of home theater and DVD systems in the 1990s.
		With the advent of digital encoding and DVDs in the 1990s, multichannel audio became popular to recreate the special effects sounds experiences in movie theaters.
	en.wikipedia.org /wiki/Multichannel_audio (208 words)

	Multichannel audio
		The other concept is to produce sound field different from the original one, however it gives the listeners a favorable impression that may generate the perception of the original sound field in the performance space.
		The audio signals in both concepts may be subject to a significant modification by a special signal processing (digital or analog) as shown in the drawing.
		Multichannel systems refer to the system that incorporate two or more transmission channels or recording process and more then two loudspeakers.
	home.tir.com /~ms/stereo/stereo.html (758 words)

	Multichannel audio -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-25)
		The earlier (additional info and facts about quadraphonic) quadraphonic (four speaker) systems were the original multichannel systems, but they never became widely popular.
		With the advent of digital encoding and (A digital videodisc; a recording (as of a movie) on an optical disk that can be played on a computer or a television set) DVDs in the (The decade from 1990 to 1999) 1990s, multichannel audio became popular to recreate the special effects sounds experiences in movie theaters.
		Systems such as (additional info and facts about Dolby Digital) Dolby Digital and (Acute delirium caused by alcohol poisoning) DTS have provided the most popular solutions for multichannel audio.
	www.absoluteastronomy.com /encyclopedia/m/mu/multichannel_audio.htm (197 words)

	OTL - File # 2925
		This invention is a method for generating multichannel sound from one- or two-channel venue recordings.
		A set of filters processes the signals from a pair of main microphones and synthesizes signals as though they were captured by microphones placed at various locations within the hall, while preserving the correct acoustical characteristics of the venue.
		Multichannel delivery of the performance is possible without imposing additional bandwidth requirements.
	www.usc.edu /academe/otl/2925.htm (253 words)

	Digital Audio Engines Offer a Fast Track to Multichannel Audio Decoding
		Audio standards are still evolving and high audio reproduction quality is essential but is no longer enough.
		Adaptable, modular audio platforms, Digital Audio Engines are ''off the shelf'' modules combining support for all major multichannel audio decoding standards with high quality analog audio and an open software architecture which supports custom functions.
		Digital Audio Engines include digital processing for all the main multichannel audio decoding formats, plus Post Processing Phases such as equalization and sound fields, with the facility for manufacturers to add their own unique post-processing features.
	www.digitalprosound.com /Htm/Articles/2000/Oct/DAE.htm (1015 words)

	SoundStage! Surrounded! - Audio Research MP1 Multichannel Preamplifier (10/2004)
		There are a number of manufacturers of two-channel components that have crossed over into the land of multichannel audio.
		This function is better known as a home-theater bypass or a unity-gain input because the volume control of the preamp is disabled in favor of another component's, usually a receiver's or processor's.
		Perhaps this is not a pivotal feature for a minimalist preamp controlling a two-channel system, but for a multichannel enthusiast who also enjoys stereo listening and home theater, system functionality and the ability to shift settings and inputs on the fly are key.
	www.soundstage.com /surrounded/surrounded200410.htm (2069 words)

	Microsoft Windows Media - Producing Multichannel Audio with Windows Media 9 Series
		However, if you are sourcing multichannel audio from a capture card, it is recommended that you use dual 733 MHz processors or higher, such as an Intel Pentium III or AMD Athlon MP.
		The peak and average values of the audio signal are calculated during encoding, and those values are placed in the header of the Windows Media file.
		The peak value of the audio signal is limited to the median of the peak and average values you specified in Windows Media File Editor.
	microsoft.com /windows/windowsmedia/howto/articles/Multichannel.aspx (1755 words)

	Multichannel Audio Player
		Because you aren't going to listen to it, "animation audio" may be low quality; optimized for animation mechanisms; or otherwise unpleasant to listen to.
		A "speaker audio" channel that is suitable for amplification and presentation to the audience.
		What we will do is to create the animation audio channel by extracting the volume envelope of the vocals, using that to modulate a 3 kHz carrier, and mix that 3 kHz signal with the DTMF tones.
	wolfstone.halloweenhost.com /HalloweenTech/audmap_MultichannelAudioPlayer.html (3385 words)

	Subjective testing of MPEG-2 NBC multichannel audio coding
		The multichannel audio systems tested were all five channel systems with three front channels, left, centre and right, and two surround channels, left surround and right surround.
		As the selection panel work proceeded, it became apparent that the codecs were giving high audio quality and consequently the tests may not include a sufficient number of mid-quality presentations which are essential in proving the overall sensitivity of the test.
		The listener was asked to judge the 'Basic Audio Quality' of the 'A' and 'B' versions in each trial and any difference from the reference was to be considered as an impairment.
	www.bbc.co.uk /rd/pubs/papers/paper_09/paper_09.html (2532 words)

	Windows Media Format 9.5 SDK Reading Multichannel Audio (Site not responding. Last check: 2007-10-25)
		When reading a file with multichannel audio, you must configure the output properly or the audio will be delivered at a lower quality and in stereo.
		High-definition audio is encoded by the Windows Media Audio 9 codec with 24-bit samples in stereo or multiple channels.
		Note You can output multichannel audio only if your application is running on Microsoft Windows XP or a later version of Microsoft Windows.
	msdn.microsoft.com /library/en-us/wmform95/htm/readingmultichannelaudio.asp?frame=true (424 words)

	New scalable multichannel audio solutions
		This typical audio system supported by Leitch and DTS equipment would give a station a simple and compatible transmission audio chain from source to receiver.
		During the audio encoding process, the encoder also loads the audio stream with the Packetized Elemental Streams needed for proper decoding.
		A key broadcast concern with any audio surround system is the need to remain compatible with all consumer receivers and decoders.
	broadcastengineering.com /aps/production/broadcasting_new_scalable_multichannel (526 words)

	MPEG . ORG - MPEG Audio Resources and Software (Site not responding. Last check: 2007-10-25)
		Section 6 of this large document is an introduction and overview of the subset of the MPEG-2 Audio standard used for HDTV.
		Many sites with pointers to MPEG audio players are listed on our Audio Players Page.
		MPEG Audio Layer 3 test bitstreams can be found on the MP3 Page.
	www.mpeg.org /MPEG/audio.html (1285 words)

	onhometheater.com - Hot Product Archives
		Hardcore audio purists who happen to enjoy movies frequently have two systems -- a stereo for music and a 5.1 (or better) system for films.
		Of course, setting up the MAP-1 in multichannel mode requires that you either let your dealer handle all the details or that you buy a demo disc and a RadioShack SPL meter, since the unit doesn't incorporate test tones.
		If you have a DVD player or multichannel SACD player with on-board surround processing and you listen to, or wish to listen to, two-channel music with as much fidelity as possible, the MAP-1 is certainly a product that might interest you.
	www.onhometheater.com /product/20030701.htm (1862 words)

	Articles - MPEG-2 (Site not responding. Last check: 2007-10-25)
		MPEG-2 (1994) is the designation for a group of coding standards for digital audio and video, agreed upon by MPEG (Moving Pictures Experts Group), and published as the ISO/IEC 13818 international standard.
		MPEG-2 is typically used to encode audio and video for broadcast signals, including direct broadcast satellite and Cable TV.
		Players are not required to playback audio with more than two channels, but must be able to downmix multichannel audio to two channels.
	www.1-player.net /articles/MPEG-2 (1445 words)

	M-AUDIO - FireWire 410 - 4-In/10-Out FireWire Mobile Recording Interface
		New high-end audio formats such as DVD-Audio are delivering output at a stunning 192kHz sampling rate.
		Unlike most audio interfaces, you can even use the aux bus to route the input signals through an external signal processor so that you can monitor with effects.
		Live Lite 4 brings you much of the audio and MIDI functionality of the multi-award winning Ableton Live, recognized for revolutionizing the DAW experience.
	www.m-audio.com /products/en_us/FireWire410-main.html (1218 words)

	Stereophile: SACD, Multichannel Audio Get Big Boost at AES
		The logos of 22 pro audio companies were displayed at the Sony/Philips SACD booth in the Convention Center's South Hall, as were those of 12 makers of consumer electronics: Accuphase, Kenwood, Krell, Marantz, Nakamichi, Onkyo, Philips, Pioneer, Sharp, Sony, Teac, and Yamaha.
		All these manufacturers are now part of the campaign to bring high-resolution audio to music lovers everywhere, a campaign that will eventually include disc players at all price points—especially the lower end of the scale, a market segment absolutely essential for SACD to gain a solid foothold.
		A brief discussion of audio trends prompted Begland's colleague, Edward Krout, to observe that he'd put his investment dollar on "boom music for 5.1"—meaning big bass, big effects, and plenty of bad rap for automotive listening.
	www.stereophile.com /news/10852 (1090 words)

	AES Conference to Focus on Multichannel Audio
		On June 26, 2003, the Audio Engineering Society will kick off three days of presentations and discussions on the present and future of multichannel audio at its 24th International Conference; the event will be held at the Banff Centre (located Banff, Alberta, Canada).
		The seminars, which will be enhanced by a multichannel monitoring room setup, will include a presentation on multichannel mastering techniques by Bob Ludwig and Steven Marcussen.
		The selection of live demonstrations include demos of multichannel audio reproduction, an MPEG-4-based interactive virtual 3-D scenery, a speaker Periphonic playback demonstration and practical examples of sound recording works by prominent recording engineers.
	mixonline.com /news/audio_aes_conference_focus/index.html (396 words)

	5.1 Entertainment Group: What is DVD-Audio? (Site not responding. Last check: 2007-10-25)
		A highly compelling feature of DVD-Audio is its multichannel audio capability, which is proving to be optimal in an automotive environment.
		Multichannel DVD-Audio is the future of packaged audio media because it can uniquely reproduce all of the nuances and musicianship of a studio session.
		Multichannel DVD-Audio also allows you to reproduce all of the ambience and dimension of a live recording just as it happened.
	www.5point1.net /dvd.php (895 words)

	Microsoft Windows Media - Building a Playback System for Multichannel Audio By Using Windows Media 9 Series
		Our goal is to deliver articles that will educate and instruct our readers about the technology and equipment used for multichannel audio and to demonstrate how anyone can get involved with it.
		Most multichannel sound cards have some sort of test that lets you send pink noise (a hissing sound) or tone (a single note like a flute) to each speaker one at a time.
		If you want to create your own surround sound music and learn lots more about multichannel audio and music, come to one of our national Fits and Starts seminars, which are free 3-hour workshops that discuss all aspects of surround sound music production.
	microsoft.com /windows/windowsmedia/howto/articles/wma9proplayback.aspx (2247 words)

	Multichannel Audio Software Guide
		Almost everything is in stereo, including most television programs, FM radio, some AM radio, and most of the better audio and video clips on the internet.
		There are a few sources that are written specifically for 2.1 audio, but you will need to have the decoding hardware necessary for at least 5.1 audio to use 2.1 audio.
		Basically, if you have the equipment to support 2.1 audio with a discrete subwoofer channel, you have the equipment needed for a 5.1 system.
	firingsquad.com /guides/multichannelsoftware (481 words)

	Multichannel Audio Hardware Guide (Site not responding. Last check: 2007-10-25)
		This is the first part of a two part series on multichannel audio.
		The first part will focus on the hardware and physical attributes and requirements for multichannel audio, followed by an article about all the software formats available.
		Our first experience with multichannel audio was probably at the movie theaters where we were in awe of all the speakers around us.
	www.firingsquad.com /guides/multichannelhardware (463 words)

	U.S. Pregrant 20040249490 - Multichannel audio system, and head unit and slave unit used for the same (Site not responding. Last check: 2007-10-25)
		Multichannel audio system, and head unit and slave unit used for the same
		A multichannel audio system is provided which is suitable for optimally utilizing a plurality of amplifiers on a network for multichannel reproduction.
		The slave units each generate an audio signal in response to data of the channel assigned by the head unit, the data being extracted from the received multichannel data received from the head unit.
	cxp.paterra.com /uspregrant20040249490.html (176 words)

	labDV - SVCD audio 5+1
		This is probably because Philips wrote the spec for SVCD and their MPEG-2 multichannel audio competes with Dolby's AC3.
		It may be possible if you play this on a computer with multichannel capabilities that you will be able to hear true 5.1 MPEG-2 audio.
		The process to create MPEG-2 audio is somehow difficult so I have thought that before installing Linux and all the required tools you may want to test your sound system.
	lea.hamradio.si /~s51kq/V-SVCD-AU.HTM (1296 words)

	About 2003 AES Conference - Multichannel Audio
		Over 180 audio engineers from around the world came to The Banff Centre in June 2003 to share the latest developments in multichannel surround audio.
		Together with a hard-working committee, Theresa Leonard, The Banff Centre’s Director of Audio, and chair of the conference created a program that was packed from morning until night with technical papers, seminars, demonstrations, and panel discussions.
		The 24th AES International Conference in Banff brought together audio engineering professionals, researchers, academics, and manufacturers for further discussions on the art, science, and future of multichannel audio.
	www.banffcentre.ca /aes (145 words)

	Dolby DP564 Technology Spotlight-Mix spotlights Dolby multichannel audio decoder
		And because there are many different formats for different playback situations, engineers need to be able to switch easily among monitoring formats in order to assess how their mixing or processing affects playback in each.
		It was with those needs in mind that Dolby designed the recently introduced DP564 multichannel audio decoder, a revamped version of the company's DP562.
		The level of the audio outputs is now adjustable with a front panel master volume knob that was absent on the DP562.
	mixonline.com /mag/audio_dolby_dp_2 (2062 words)

	VRS Recording Software - Audio Recording Software, Voice Recording, Call Recording and More
		This audio recording software can record 1 to 32 audio channels simultaneously with automated start and stop if required.
		The VRS audio recording software can be used for telephone line recording (call recording), radio station program logging, radio communication recording, remote audio monitoring, control room voice recording, remote conference or voice recording, or for other specialized applications.
		If you have any suggestions for improvements to VRS or suggestions for other audio software that you might need, please visit our suggestions page.
	www.nch.com.au /vrs (1213 words)

	Multichannel Audio - Digital Video Forums
		I am trying to encode some of my DVDs, but don't want to limit myself to 2 channel audio, but rather, I want to encode 4 channel to get a bit of the surround effect.
		From research I have done, it seems that OGG audio can handle multiple channels, and that the resulting audio and video stream can be muxed?
		However, I have not yet been able to get OGG to encode 4 channel audio and be able to play it back in media player.
	forum.digital-digest.com /showthread.php?t=27078 (147 words)

	ProSoundNews Online Daily - AES Conference to Focus on Multichannel Audio (Site not responding. Last check: 2007-10-25)
		New York City (March 19, 2003)--On June 26, the Audio Engineering Society (AES) will kick off three days of intensive presentations and discussions on the present and future of multichannel audio at its 24th International Conference.
		The selection of live demonstrations, which are a key part of the program, include demos of multichannel audio reproduction, an MPEG-4-based interactive virtual 3D scenery, a speaker Periphonic playback demonstration and practical examples of sound recording works by prominent recording engineers.
		Day Two's highlights include a special demonstration of microphone technology and techniques in the recording studio, as well as a round table of prominent engineers who will share their views of the multichannel field based on their experiences on the front line.
	www.prosoundnews.com /stories/2003/march/0319.5.shtml (481 words)

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