Path: chuka.playstation.co.uk!scea!peter_alau@playstation.sony.com From: "Lemont Washington" Newsgroups: scea.yaroze.programming.sound Subject: Re: surround Date: Wed, 12 May 1999 12:05:56 -0400 Organization: Defiantsoft Lines: 33 Message-ID: <7hc8c7$rfv1@scea> References: <3714CD55.6D04727E@sums.freeserve.co.uk> <371CB2EE.193F83B@playstation.sony.com> NNTP-Posting-Host: oak1.dfsc.com X-Newsreader: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3110.3 This is not true. If you examine the dolby surround sound spec which can be found at ftp://x2ftp.oulu.fi/pub/msdos/programming/faq This is how you can get a sound to play to the rear speakers: play your sound sample one one channel say the left channel for instance. at the same time play the same sound sample on the right channel. but make sure you invert the bits on the right sound channel. they way the dolby surround sound encoding process works is that the decoder listens to both channels. when the sample from one channel is the negated value of the sample of the other channel it will stop sending the sound to the front left and right speakers and forward them via hardwired circuitry to the rear channel speakers. You can't control which rear speaker it will send them to both. The faq file on the dolby surround sound algo is really informative and you should check it out. any sound source with stereo channels is capable of doing surround sound. that is how you can put your tv in surround sound it has a left and right output and if you have a decoder going to a stereo system you can benifit from this. Future Crew has a demo called second reality, this demo used the gravis ultrasound for surround sound. And FYI, no audio system takes in negative sound values.... this is not possible.... Rob Vawter wrote in message <371CB2EE.193F83B@playstation.sony.com>... > > > >> does anyone know which command, and what variables I would change to >> project the sound behind and above the player. > >No commands exist to perform surround sound in the Yaroze kit. Negative >volume values are needed and cannot be input in the Yaroze libs. > >