I installed a M-Audio Revolution 7.1 (snd-ice1724) in my mythtv box. I had mythtv working fine with the machine's onboard sound (snd-trident) using OSS emulation. The revo works correctly for things like xine, mplayer, aplay (of course), play, etc. In mythtv, however, I get no sound.
I dug into the mythtv code, and found that it is doing a call to ioctl(audiofd, SNDCTL_DSP_GETOSPACE, &info) and using the info.bytes value that is returned to determine whether or not to write to the card. The first call to SNDCTL_DSP_GETOSPACE appears to return a reasonable number, but from that point, the numbers returned are all over the place, and are often negative. So, mythtv, of course, won't write to the card. I find that if I comment out the code that checks the values returned from GETOSPACE, I get sound, but it is out of sync with the video (sound slightly behind video). I'm using the dmix plugin, if that matters, but I got the same results without the plugin. I'm willing to debug this further, but I've not done anything with alsa or soundcards before, so I need a bit of help in determining where to look. -- Ann P. ------------------------------------------------------- SF.Net is sponsored by: Speed Start Your Linux Apps Now. Build and deploy apps & Web services for Linux with a free DVD software kit from IBM. Click Now! http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
