On Saturday 07 July 2007 16:17, Nigel Henry wrote: > On Saturday 07 July 2007 14:49, Tom Horsley wrote: > > On Sat, 7 Jul 2007 08:37:01 -0400 > > > > It's worth a try Tom. Just rename snd-usb-audio.ko back to it's > > > > original name, add the 2 lines to /etc/modprobe.conf, plug in the > > > > webcam, and reboot. > > I'm wondering what would happen if I had two different USB audio > > devices plugged in though :-). > > Well I've got 2 devices on the USB, but only one, my usb midi keyboard is > audio related. The other one is a webcam, and is a cheapo one with no > integrated mike. That just uses /dev/video1. > > If you have more than 1 USB audio device that you want to connect, the > syntax is a bit different for the 2 snd-usb-audio lines in > /etc/modprobe.conf. This has been discussed a bit on the alsa-user list. > I've got an email lying around with the details, and will try and find it > and post the details to the list. > > Anyway. I'm glad your problem is fixed, and perhaps if Antti is reading > this thread still, it may fix his problem with the usb headphones. > > Nigel. Ok. I've found the email about ordering multiple usb audio devices. This was posted to LAU in March by Lars Luthman, and is his setup for 3 usb audio devices. This is the relevant part of my /etc/modprobe.d/alsa-base: alias snd-card-0 snd-emu10k1 alias snd-card-1 snd-cmipci alias snd-card-2 snd-via82xx alias snd-card-3 snd-usb-audio alias snd-card-4 snd-usb-audio alias snd-card-5 snd-usb-audio options snd-emu10k1 index=0 options snd-cmipci index=1 options snd-via82xx index=2 options snd-usb-audio index=3,4,5 vid=0x0c45,0x0a4d,0x17a0 pid=0x60af,0x0090,0x0001 As you see above on the alias lines, he has 3 usb audio devices. Obviously, if you only had one soundcard as card0, these three lines would number card1, 2, and 3. The options line for snd-usb-audio is where the fun starts, as you need to find the vid's (vendor id's), and pid's (product id's) for your usb audio devices. There is a list of vendor/product id's at http://www.linux-usb.org . Just click on the link "USB Vendor/Device IDs list" . It's a bit out of date, as I couldn't find any of Lars's products, but the vendor id's were ok. Neither could I find my Evolution MK-225C usb midi keyboard listed, but my omnivision webcam was listed. You can see the vid's, pid's for your webcam by running /sbin/lsusb. The relevant bit for my usb midi keyboard is ID 0a4d:0066 Evolution Electronics, Ltd. This is all in hex, so the 0's are zero's. If you look at Lars's options line above you will see that the vid's/pid's are prefixed with 0x. Someone can correct me if i'm wrong, but I believe that this simply states that the the following is hex. I can't say much more as I've only the one USB audio device, but post back if you want more info. Nigel.
