On Mon, 2008-03-10 at 11:22 +0100, Arnold Krille wrote:> Am Sonntag, 9. März 2008 schrieb Mark Knecht:> > On Sun, Mar 9, 2008 at 3:52 PM, drew Roberts <zotz@xxxxxxxxxxx> wrote:> > > On Sunday 09 March 2008 18:44:21 Mark Knecht wrote:> > > > Hi,> > > > I'm aware of and use standard Alsa methods to keep different sound> > > > cards in the same system straight as far as Alsa is concerned. I'm> > > > wondering what the proper process would be to keep 3 HDSP9652's which> > > > are physically in the same system, or multiple USB sound devices> > > > external to the system, straight as far as Alsa is concerned. I'd like> > > > to know that a certain card always will be always be card 0, card 1 or> > > > card 2. I do not want Alsa or Linux to make this decision for me and I> > > > certainly don't want Alsa to change them from boot cycle to boot> > > > cycle.> > > I needed to solve this problem a while back. The best help I got was> > > telling me it was not possible.> > Humm, that's a pretty glaring disappointment, assuming it's true, and> > I have no reason to believe it isn't.> > Probably the one giving that answer was me. It is not entirely impossible. The > solution is roughly: I don't think that this is what Mark was asking for. The problem he is facing is that if you have, say, 3 RME HDSP's, theinformation used to identify them to ALSA (at least) is identical inevery case. It is therefore tricky to ensure that what you consider tobe the "first" card is always hw:0 and so forth. The usual ALSAmechanism relies on PCI id and other stuff that, IIRC, is not going todistinguish between 3 identical cards. He does *not* want to run the 3 cards as one, and if he does, he knowshe has to keep them in sync. I don't know of a solution to this. I guess that the PCI registers forthe cards contain some kind of serial number, but how you can get ALSAto based its snd_index assignments on that, I don't know. --p _______________________________________________Linux-audio-user mailing listLinux-audio-user@xxxxxxxxxxxxxxxxxxxxxxxx://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
