home theater automotive professional audio founded 2002 headquarters los angeles california key people chris kyriakakis tomlinson holman sunil bharitkar philip hilmes products multeq dynamic volume dynamic eq dynamic surround expansion sound equalizer sub equalizer website www.audyssey.com audyssey laboratories inc. audyssey is a usa based company specializing in technologies that address acoustical problems in sound reproduction systems used in homes cars studios and movie theaters . contents 1 history 2 technologies 2.1 room acoustics correction multeq and eq 2.2 loudness compensation dynamic eq 2.3 volume leveling dynamic volume 2.4 surround envelopment audyssey dsx 3 see also 4 references 5 external links history edit audyssey was created in 2002 as a spin off from the usc integrated media systems center the national science foundation engineering research center at the university of southern california . 1 it was founded by prof. chris kyriakakis from the usc viterbi school of engineering and prof. tomlinson holman from the usc school of cinematic arts along with two former usc students and researchers dr. sunil bharitkar and philip hilmes . the first audyssey technology was released in home theater receivers in 2004 . it addressed the negative effects of room acoustics on sound reproduction . since then audyssey has delivered several audio technologies that seek to overcome acoustical limitations in audio systems and better match human perception . since 2004 audyssey technologies have appeared in numerous consumer professional and automotive products . technologies edit room acoustics correction multeq and eq edit audyssey multeq a technology that allows consumers and professionals to fix the acoustical problems in rooms that arise from the interaction of sound from the loudspeakers with the surfaces in the room . multeq uses acoustical measurements in the time domain taken by a microphone around the listening area and combines this information to evaluate the acoustical problems that cause audible distortions in the frequency response . multeq then creates a room equalization filter for each speaker and subwoofer in the system to correct these problems . audyssey eq is a direct extension of multeq for products that come with attached loudspeakers such as televisions and home theater in a box systems . loudness compensation dynamic eq edit audyssey dynamic eq a technology that solves the problem of deteriorating sound quality as the playback volume is decreased . dynamic eq combines information from incoming source levels and actual output sound levels in the room or car to make moment by moment adjustments that compensate for the changes in human hearing at different listening levels . volume leveling dynamic volume edit audyssey dynamic volume a technology that solves the problem of constantly varying volume across program material . it monitors the volume in real time and maintains the desired listening level for all content while optimizing the dynamic range . surround envelopment audyssey dsx edit audyssey dynamic surround expansion dsx a scalable technology that expands the soundstage of surround sound content by adding width and height loudspeaker channels . audyssey dsx then synthesizes the necessary content for these channels to reproduce the necessary acoustical and perceptual cues that enhance soundstage rendering for surround sound . audyssey has an 11.2 surround sound system using dsx which adds two height and two wide left and right channels to a traditional 7.1 mix . see also edit dolby labs volume leveling competitor drc digital room correction free room correction software . the documentation is very good and contains a lot of background information including real measured results thx loudness compensation competitor srs labs surround sound trinnov audio loudspeaker optimization dirac research high end digital sound optimization room correction and sound field synthesis references edit imsc spin off audyssey labs introduces breakthrough audio technology in home theaters usc viterbi school press release 2004 http imsc.usc.edu news releases audyssey.html external links edit audyssey website audyssey blog avr review of audyssey sound equalizer audioholics review of denon avr 3806 audyssey multeq xt retrieved from https en.wikipedia.org w index.php title audyssey laboratories & oldid 743513657 categories audio equipment manufacturersmanufacturing companies based in los angeleshidden categories pages using infobox company with unsupported parameters navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata 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