
	Where results make sense

Topic: Ambisonics

In the News (Fri 10 Jul 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Ambisonics - Wikipedia, the free encyclopedia
		Ambisonics, invented by Michael A. Gerzon, Peter Fellgett and John Hayes in the early 1970s, is a one-point in-phase recording and replay technique for encoding and decoding sound information on a number of channels to reproduce a "3 dimensional" sound field.
		Readers should note that the coordinate system used in Ambisonics follows the right hand rule convention with positive X pointing forwards, positive Y pointing to the left and positive Z pointing upwards.
		The Ogg Vorbis project has shown interest in implementing ambisonics as a means for including surround sound in their project.
	en.wikipedia.org /wiki/Ambisonics (684 words)

	Ambisonic Surround Sound FAQ - WikiFAQ - Answers to Frequently Asked Questions (FAQ)
		Ambisonic Surround Sound is a set of techniques, developed in the 1970s, for the recording, studio processing and reproduction of the complete sound field experienced during the original performance.
		Ambisonic technology does this by decomposing the directionality of the sound field into spherical harmonic components, termed W, X, Y and Z. The Ambisonic approach is to use all speakers to cooperatively recreate these directional components.
		In an Ambisonic decoder the spherical harmonic direction signals, W, X, Y and Z, are passed through a set of shelf filters which have different gains at low and high frequencies designed to match different ways the ear/brain localises sounds.
	www.wikifaq.com /Ambisonic_Surround_Sound_FAQ (4539 words)

	Whatever Happened to Ambisonics
		Ambisonics was the brainchild of a small group of British academics, notably Michael Gerzon of the Mathematical Institute in Oxford, and Professor P B Fellgett of the University of Reading.
		Ambisonics was originally envisaged as a system in which the home listening room acoustic could be 'overlaid' by an image of the original soundfield captured at a live performance--typically a classical concert.
		Ambisonics was originally designed to reproduce sonic actuality as accurately as possible--an approach exemplified by Nimbus Records, whose 'Natural Sound' is more an entire philosophy than simply a method of recording and playback: surround sound handled as accurately as possible is just one of the facets of the Nimbus approach.
	fgouget.free.fr /ambisonic/Ambisonic_AM91.shtml (6847 words)

	Ambisonic Surround Sound FAQ, version 2.7
		Ambisonic technology is based on a meta-theory (a theory of theories) of sound localisation developed by the late Michael A Gerzon when he was with the Mathematical Institute, University of Oxford (see the Gerzon 1992a reference).
		In an Ambisonic decoder the spherical harmonic direction signals, W, X, Y and Z, are passed through a set of shelf filters which have different gains at low and high frequencies designed to match different ways the ear/brain locates sounds.
		Ambisonics is subtle; it does not lend itself to the dramatic ping-pung-pang-pong effects beloved by salespeople.
	www.iua.upf.es /~ramon/recerca/bib/BIB_assFAQ.html (6284 words)

	S2N:"Whatever Happened to Ambisonics? ptI"
		Ambisonics was the brainchild of a small group of British academics, notably Michael Gerzonof the Mathematical Institute in Oxford, andProfessor P B Fellgett of the University of Reading.
		Ambisonics wasoriginally envisaged as a system in which the home listening room acousticcould be 'overlaid' by an image of the original soundfield captured at a liveperformance--typically a classical concert.
		Andbecause Ambisonics tries to recreate the original soundfield, speakers tend towork together and thus smaller speakers are often more effective for Ambisonicreplay--they give more accurate localisation across the frequency range becausethe drivers are closer together, and they tend to exhibit better bass responsethan when the same speakers are used in stereo.
	www.paul-lehrman.com /s2n/Articles/Ambisonics.html (3309 words)

	Surround sound - Wikipedia, the free encyclopedia
		The third approach, which is based on Huygens' principle, attempts to reconstruct the recorded soundfield wavefronts within the listening space and so might be regarded as a form of "audio hologram".
		There are two related forms of this approach,[1] the first of which, Ambisonics, provides an exact reconstruction at a central point and a less and less accurate reconstruction as you move away from this point.
		In the limit, WFS and Ambisonics converge as was shown some years ago by Rozzenn Nicol and Marc Emerit[3] but for the present Ambisonics has a far greater market penetration in the domestic arena and especially amongst musicians involved in electronic and computer music.
	en.wikipedia.org /wiki/Surround_sound (1650 words)

	What is Ambisonics and how can I get some
		Ambisonics is a special case of wavefield synthesis, which seeks to resynthesize a recorded soundfield in a new location.
		Ambisonics is very interesting in that it doesn't involve channels the way we're used to thinking about them.
		The difference between stereo and Ambisonic recording is as substantial as the move from mono to stereo.
	cec.concordia.ca /econtact/Diffusion/Ambisonics.htm (1532 words)

	Michael Gerzon
		While he was certainly part of an Ambisonic team, it was he who did the vast majority of the original theoretical work, and a good deal of the practical.
		Ambisonics is a truly wonderful system to work with, and sounds great, whether you decode it or not.
		His work in Ambisonics built on the pioneering discoveries of Alan Dower Blumlein, Britain's earlier audio genius who developed many of the basic principles of stereo, and it is I think fitting to both men to mention them in the same breath.
	www.brainwashed.com /h3o/gerzon.html (714 words)

	Ambisonic Surround Sound
		With Ambisonics, a sound field is decomposed into spherical harmonic components, termed W, X, Y and Z. These are collectively called B-Format.
		A bibliography of publications about Ambisonics and related matters compiled by the late Michael A Gerzon, the "Brains" behind Ambisonics, and others is available.
		Ambisonic microphone and UHJ encoder, UHJ decoder, joystick controlled pan-rotate, by Henry
	members.tripod.com /martin_leese/Ambisonic (437 words)

	Ambiophonics by Ralph Glasgal: Realism in Sound Reproduction -- Part III
		Ambiophonics, which borrows a little from Binaural and still less from Ambisonics, assumes that there are more localization mechanisms than are dreamed of in the previous philosophies and strives to satisfy all of the mechanisms, as far as is possible.
		Also, in contrast to Ambisonics, Ambiophonics does not require a known precise placement of ambience speakers and their polar radiation characteristics are not of critical importance.
		Ambisonics, Binaural, and Ambiophonics do not employ the phantom image mechanism to provide the front stage localization and therefore, in theory, should all sound more realistic than stereo and, in fact, do.
	www.ambiophonics.org /209.238.98.180:21/Realism3.htm (2991 words)

	Article on 5.1 Alternatives - OCT03 AUDIOPHILE AUDITION
		Ambisonics has the advantage that it treats all directions as equal in importance and needing equal sound quality.
		B+ Ambisonics also allows the listener to adjust the soundfield for his/her room and to adjust the ambience to their taste.
		Ambisonics provides a convenient but not exclusive way to record signals that can be optimally reproduced in these ways.
	www.audaud.com /audaud/NOV03/EQUIP/equip3OCT03.html (4556 words)

	[No title]
		Ambisonic technology is based on a meta-theory (a theory of theories) of sound localisation developed by Michael A Gerzon when he was with the Mathematical Institute, University of Oxford (see the Gerzon 1992 reference).
		Ambisonic Surround Sound differs from the Dolby surround systems in that the former is designed for the realistic reproduction of music while the latter, to enhance the enjoyment of motion pictures.
		To carry Ambisonic Surround Sound the proposal suggests encoding the W, X, Y and Z signals onto the HQAD disc as a set of five feeds for speakers arranged in a regular pentagon, plus an optional height channel.
	www.pitt.edu /AFShome/s/z/szekeres/public/html/sub/usenet/amb.txt (6338 words)

	Explaining Surround Sound
		The basic principle of Ambisonics is to capture or create a soundfield in the most natural and efficient way, transmit it with an efficient number of channels and replay it with a number of speakers you can reasonably place in your listening room.
		Ambisonic recordings can easily be decoded for 5.1 speaker systems and some manufacturers include the provision for it in their receivers and preamps.
		Several DVD recordings use Ambisonic technology, but are decodes in the studio to suit 5.1 replay systems, so you may not be aware that the system is being used, apart from noticing extremely good surround localization and a more realistic surround soundstage than you generally find in current recordings.
	www.avrev.com /equip/surround (1761 words)

	Surround Professional 2001 - Ambisonics: Thomas Chen and Richard Elen
		Ambisonics is a complete end-to-end system that specifies everything in the recording chain from microphones and miking techniques to processing algorithms to playback requirements and setup in order to produce a realistic simulation of the soundfield at the recording location.
		Ambisonics records the complete soundfield information at one point in space, and seeks to reproduce a simulation of that soundfield by playing back to the listener the proper perceptual cues derived from the information recorded at that single point.
		Ambisonics literature describe ways to scale up or down the number of playback channels indefinitely: Ambisonics can be reproduced with 6 speakers or dozens of speakers, with more speakers giving better reproduction quality.
	www.smr-home-theatre.org /surround2001/technology/page_07.shtml (508 words)

	Cantares - Speaker Kits, Surround Processor, CDs (Site not responding. Last check: 2007-11-01)
		Ambisonics is a "surround-sound" system developed by the late Michael Gerzon in Great Britain in the early 1970s.
		In Ambisonics, audio can be carried over three or four "channels", called W, X, Y, and Z. These signals are not directly related to physical speaker locations, but spatially represent the sound.
		For example, several acoustically recorded Ambisonic signals could be mixed together, and also have discrete tracks mixed in to any spot in space.
	www.cantares.on.ca /ambi.htm (716 words)

	NSS News: Ambisonics: The Art of "Being There" (Winter 1994)
		Ambisonics must not be equated with quad which simply comprised stereo times two- 4 speakers in all.
		In this respect, ambisonics differs from all other surround sound systems which are designed to employ a fixed number of loudspeakers (generally no more than six).
		Ambisonics preserves the original locations of music, ambiance, and audience as they originally existed is a three-dimensional space, and in so doing, the musical timbre is not compromised.
	www.naturesounds.org /Win94Ambi1.html (785 words)

	Stereophile: Space...the Final Frontier
		Ambisonics is, in fact, the logical extension of Blumlein.
		Ambisonics does not require a compromise (read: lowest common denominator) for widely varying playback-room dimensions or huge variations in consumer playback equipment as a part of the recording considerations.
		Curiously, Ambisonics is thought to be "tricky" to record, perhaps because there are fewer microphone placements and general recording tricks of the trade that can be deployed in the name of its art.
	www.stereophile.com /reference/74/index11.html (2226 words)

	Making surround-sound the Ambisonic way
		It's called "Ambisonic Surround Sound Sampler" and was produced for Onkyo by Nimbus Records of England.
		When a narrator started walking around the Ambisonic microphone, I was able to hear his voice coming from all sides, including the rear.
		Often, the left and right microphones for Ambisonic recordings are built into the same housing, with their pickup elements only an inch or two apart.
	aroundcny.com /technofile/texts/ambisonics.htm (598 words)

	Larry Clifton's MultiChannelSound Shop -- Ambisonics: An Incomplete Glossary
		Because the concepts behind the recording and playback systems using in Ambisonics are radically different from those employed in quadraphonics, Ambisonics has required its own vocabulary.
		Ambisonics, Ambisonic technology are terms we use to describe the complete technology including the Soundfield Microphone, B-format signal processing, UHJ encoding/decoding and psychoacoustic compensation in decoders.
		This can be contrasted with the technique in Ambisonics of assigning a mono source to a direction rather than to channels related to loudspeaker feeds, the derivation of loudspeaker feed signals being a matter for the decoder according to the actual positions of the loudspeakers.
	members.tripod.com /martin_leese/Ambisonic/reprint007.html (803 words)

	The Ambisonic Bibliography by Michael Gerzon
		Many of the 1990s references include new developments in Ambisonic technology relevant to the digital/multimedia era, and not just a rehash of older versions of the technology.
		Historically, many of the basic ideas of Ambisonics were discovered independently around 1971/72 by Duane Cooper and by Gibson et al.
		I will take the opportunity to put these on the Ambisonics 'Home' page I am maintaining on our World Wide Web server and, of course, if anyone wants to copy the HTML version when it appears on there (give me a couple of days, please!), they are most welcome.
	www.angelfire.com /or/mbuick/ambisonicsbib.html (2203 words)

	Untitled Document
		Ambisonics is a surround sound system of recording and playback that uses the psycho-acoustic model of human directional hearing to provide accurate, convincing localizations of sounds in a three-dimensional space.
		The Ambisonics system is superior to the mainstream offerings of 5.1 Surround Sound, Dolby Digital, etc. on several levels.
		Instead of the standard four channels in a first order Ambisonic recording, the stereo pair is added for a total of six.
	www.its.caltech.edu /~joshua/ee107b_2003/ambisonic.htm (820 words)

	Articles on Audio and Broadcasting
		Ambisonics for the New Millennium -- this August 1998 article details the principles of G-Format (the transmission of 5.1-decoded Ambisonic speaker feeds) as a means of supplying Ambisonics to 5.1 surround listeners without the need for a decoder at home.
		Ambisonics in the Age of DVD -- This March 1998 article is a highly extended (and thus far more detailed) version of the article of the same name that appeared in the April 1998 US and May 1998 UK issues of AudioMedia magazine.
		Ambisonic Mixing - an introduction -- originally published in Studio Sound, September 1983, this article describes a practical evaluation of the prototype Audio and Design Ambisonic Mastering System, including setup instructions and some starting points for the use of the equipment to create UHJ mixes.
	www.ambisonic.net /articles.html (2020 words)

	Ambisonic Surround Sound FAQ, v2.7 (Site not responding. Last check: 2007-11-01)
		==================================== Ambisonic Surround Sound is a set of techniques, developed in the 1970s, for the recording, studio processing and reproduction of the complete sound field experienced during the original performance.
		Ambisonics has suffered from the following: o It came to market just as quadraphonics was dying away.
		o Ambisonics is thought of as a "purist" technique and not applicable to multi-track studio recording.
	omicron.felk.cvut.cz /FAQ/articles/a854.html (6948 words)

	Talkback:"Whatever Happened To Ambisonics?"
		However, in the Ambisonic environment, the Soundfield mic does not behave as a steerable microphone.
		This represents a problem in 3-D Ambisonics too, incidentally, where the smallest number of speakers required for width-height decoding -- six -- lands you with a layout completely incompatible with regular stereo, so instead you have to use eight: two rectangles, one horizontal and one vertical.
		But Ambisonics does not solely rely on level, so as a result you can put the speakers anywhere you like (if you have four, they should sit in a rough rectangle with a ratio of sides between 2:1 and 1:2) as long as you set the decoder's layout control accordingly.
	www.paul-lehrman.com /s2n/Talkback/AmbisonicsTB.html (4270 words)

	Larry Clifton's MultiChannelSound Shop -- UHJ Ambisonic Encoding (Site not responding. Last check: 2007-11-01)
		In contrast, the purpose of Ambisonics is to create an accurate psychoacoustic illusion of a sonic event.
		Ambisonic decoders use the W, X and Y signals to create four or more speaker feeds for the horizontal sound field.
		Though almost all available Ambisonic recordings were made live with a single microphone, Ambisonics supports audio mixing, including movement of sounds around or across the sound field, or even rotation of the sound field.
	home.earthlink.net /~larryclifton/uhjtext.html (509 words)

	Larry Clifton's MultiChannelSound Shop -- Ambisonics Decoded
		Ambisonics, however, is a total system, from microphone to listening room.
		Ambisonics, therefore, rationalizes recording technology, both in the concert hall and the studio.
		This is done with a control on the front of the decoder, after measuring the length, width and height of the speaker array.
	home.earthlink.net /~larryclifton/reprint001.html (1808 words)

	aud3
		B-format Ambisonics Four audio channels provide all the information required to recreate a soundfield in three dimensions: one is "left minus right (Y component)," one "front minus back (X)," one "up minus down (Z),"—all using closely spaced figure-eight mics.
		Minimally-realistic horizontal-only reproduction of 360-degree sound fields (music or otherwise) for people with heads that can turn will require at least six identical full range speakers that are equidistant from the center of the listening area, and equally-spaced from one another.
		This is taken care of, thanks to the work behind a paper presented by RandD staff from Meridian Audio Ltd at the recent AES Banff conference.
	www.positive-feedback.com /Issue9/aud3.htm (4120 words)

	ambisonics - Cockos Confederated Forums
		I would like to be able to use ambisonic plugins like http://www.dmalham.freeserve.co.uk/bpan_help.html I guess that means support for multichannel vst's, but I am not very knowledgeable in this area.
		thanks for the reply - I'm new to ambisonics but my understanding is that the ambisonic audio is encoded as a 4 channel audio file which basically captures all the audio/spatial aspects of the source sounds.
		The encode/ and decode plugins are available from gerzonic.net and York Uni http://www.york.ac.uk/inst/mustech/3...o/welcome.html - I have to admit a lack of experience, but it appears that you can encode any set of signals to B-format and then decode to up to 16 speakers using the gerzonic decoder.
	www.cockos.com /forum/showthread.php?t=611 (611 words)

Try your search on: Qwika (all wikis)