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7020100
(Get the code!)
I'm running Gutsy and just noticed today that applications that had been happily playing through my built-in snd_hda_intel device were failing. It looks like some recent update (or random cosmic rays) caused my two sound devices to swap indexes. I now have
cat /proc/asound/
0 snd_ice1712
1 snd_hda_intel
I think it was the other order before, and I did nothing that I would expect to change the sound configuration. It seems to me there was a GUI way to set "default sound device" but I can't find it any more. I'll try one of the non-gui ways to control alsa device numbering.
I use the ice1712 for complex (multi-track recording) stuff and the hda_intel for simple playback since the ice1712 fails to provide the simple kind of mixer interface that many sound applications expect to see. But I see that Windows Vista doesn't support my M-Audio Delta sound card (alias ice1712) at all currently.