Date: Sun, 25 Feb 2007 19:19:34 -0600 From: Matt Stegmeir <mattsteg@puresimplicity.net> To: freebsd-multimedia@freebsd.org Subject: Multichannel Sound output Message-ID: <45E235A6.40004@puresimplicity.net>
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I've been playing around with multichannel sound output in FreeBSD recently and wnated to share a bit of what worked for me, because I don't see a lot on this list about stuff that works, more about stuff people are going to try or are working on. I'm using the backported sound stuff from http://people.freebsd.org/~ariff/ with the emu_10kx driver on an old sblive! value. The driver exposes front and rear outputs as separately when compiled with options SND_EMU10KX_MULTICHANNEL. In order to expose that functionality to applications, I'm using the pulseaudio (formerly polypaudio) port with the module-combine capability to relink the front and rear channels into a virtual multichannel source. Xine from ports/packages has pulseaudio support enabled out of the box. Mplayer, as of now, still supports polypaudio instead. There's a patch out there to convert it to pulseaudio, but I had compile issues, even when using the same svn release that the patch was against. I just wanted to share this in case anyone else was working to get multichannel output working for them.
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