Consistent naming with USB/PCI devices

I have an onboard audio device -- a Radeon HD 6500D -- which appears in aplay -l as two different audio cards -- the HDMI audio, and an analog audio. In addition, I have an external USB audio card I use for podcasts. So the three audio devices are:
**** List of PLAYBACK Hardware Devices ****
card 0: CODEC [USB Audio CODEC], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: Generic_1 [HD-Audio Generic], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
Here's the problem: Every time I reboot, that list changes. Sometimes the USB card is 0, sometimes 1, sometimes 2. So any configurations that specify card/device like 0:0 or 2:0 stop working if the device order changes. This not only messes up the podcast software (idjc) but also anything that simply plays through the default audio -- since default may sometimes be 0:0, sometimes 0:1, etc. I worked around this by creating three different asound.conf files where it identifies "default" as any one of those three, or I can just keep rebooting until they're in my preferred order.
Is there any way I can force it to consistently use the same card number for the same device across reboots?

There are (at least) two ways that are both covered in the wiki. You can either use device names rather than numbers (in .asoundrc), or create a modprobe .conf file to specify the order of loading.
I've used both methods, and they each worked well.
Last edited by Trilby (2013-05-15 23:15:48)

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