[linux-audio-user] ordering usb sound cards

[Eric Dantan Rzewnicki]

On Tue, Mar 20, 2007 at 12:05:54AM -0400, Lee Revell wrote:
> On 3/19/07, Eric Dantan Rzewnicki <eric at zhevny.com> wrote:
> >I've read some of Christoph Eckert's posts from 2005 about passing index
> >options to snd-usb-audio when it gets loaded, but I haven't been able to
> >get it to work. There is a builtin mic with the non-functional camera
> >that is apparantly on the usb bus, the internal SiS AC'97 device and
> >sometimes an edirol ua-25.
> >
> >Any one of them can end up in any position. I've tried messing with
> >options in modprobe.d, but haven't figured out how to make the cards
> >stick to their card numbers on each boot.
> 
> I don't know about ordering multiple USB devices, but at least you
> should be able to force the internal card to be card 0 by passing
> index=0 to snd_intel_hda or whatever driver it needs...

Yes, I had figured that bit out, but the 2 usb devices still came up in
random order. I wish I could just disable the "video" device's mic, but
attempting to blacklist it by vid and pid did not work properly ... the
ua-25 was also left out.

> (Probably not helpful to you now but the real solution is to address
> cards by name, especially now that ALSA will have a usable device
> enumeration API in 1.0.14.  So you would configure the streaming
> server to stream from "default:UA-25" and monitor "default:HDA-Intel")

indeed. that would be useful.

-Eric Rz.