USB audio

Albert Solana txena at
Tue Mar 1 18:30:30 UTC 2005


On dt, 2005-03-01 at 19:43 +0900, toyfactory wrote:
>Thanks for explaining, that'll come in useful later!  At the moment I
>only have /dev/dsp, which corresponds to my on-board sound (which works
>fine).  How do I get the system to create another device corresponding
>to my USB device?  (I thought maybe sudo MAKEDEV update, but it doesn't
>seem to do very much).

Every USB device I plug into my laptop is detected and it creates a
corresponding device due to the hotplug system.

You should have the correct option enabled in your kernel. I am using
Ubuntu Hoary and my options are:
$ cat /boot/config-2.6.10-4-386 | grep -i snd_usb

And in Ubuntu Warthy:

$ cat config- | grep -i snd_usb

So, I think you also have them enabled.

Your USB sound device should be listed in lsusb command:

$ lsusb
Bus 001 Device 003: ID 0d8c:0001 C-Media Electronics, Inc.

Also, whenever an usb device is connected, it is reported in kernel and
system log. If I search into my kern.log I can find this:

$ tail -n 200 | less /var/log/kern.log
Mar  1 18:03:39 localhost kernel: usb 1-1: new full speed USB device
using uhci_hcd and address 3
Mar  1 18:03:39 localhost kernel: usbcore: registered new driver

As you can see, my kernel detect the usb device and mount the correct

Hope it helps,
** Albert Solana - aka - Txena ** 

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