On Thu, Jun 06, 2002 at 11:29:52AM +0200, Vincent Vanackere wrote: > Hi, > > I'm sorry to ask such a common question here, but I'd like to know if > it is possible to configure my (old) Gravis Ultrasound ISA PnP card in > order to enable multiple open of /dev/dsp with alsa.
Should be possible. With a GUS PnP you have to use the second pcm device. first one is the codec and second is the synth. That would be mapped to /dev/adsp for OSS emulation. You have to pass the snd-interwave module snd_pcm_channels=n parameter where n is from 2 to 16. The problem with GUS synth is that it uses non-interleaved data layout so it's not relly useful for pcm stuff. alsa-lib doesn't want to do the required conversion for some reason. Interwave supports also interleaved DMA but the driver doesn't use this feature. One way of using it currently is having multiple mono wavs. "aplay -D plughw:0,1 -c 1 -I mono.wav" will play one file. You can use that multiple times at the same time or you can specify all the files at once "aplay -D plughw:0,1 -c N -I mono1.wav mono2.wav ... monoN.wav". OK. I just checked and it only works with one or two channels per aplay. So if you want more channels you'll have to run multiple aplays simultaneosly. And the obligatory ad... :) If you really want to use hardware mixing you can try the mikmod driver I wrote. It requires CVS version of alsa-lib or a patch. Both are at "http://www.saunalahti.fi/~syrjala/alsa/"; Great card BTW :) Well apart from the nasty hissing bug. I have one with 16 MB memory. A really nice card with Utopia soundbank. If only Jaroslav would have the time to add MIDI emulation to the driver... -- Ville Syrjälä [EMAIL PROTECTED] http://www.sci.fi/~syrjala/ _______________________________________________________________ Don't miss the 2002 Sprint PCS Application Developer's Conference August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
