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Subject2.6.39.2: alsa question: usb sound/card shows up as mixer1/audio1?

Is this a simple udev issue or something else?
I bought two of these but they are actually different devices, on one host
it works ok, on the other, I get this:

p34:~# dmesg|grep -i audio
[ 15.499078] usb 2-2.4: Product: C-Media USB Audio Device
[ 15.500235] input: C-Media USB Audio Device as
[ 15.500416] generic-usb 0003:0D8C:0008.0003: input,hidraw2: USB HID
v1.00 Device [C-Media USB Audio Device ] on usb-0000:00:1d.7-2.4/input3
[ 15.534185] usbcore: registered new interface driver snd-usb-audio
p34:~# ls /dev/mixer*
p34:~# ls /dev/audio*

$ cat /proc/asound/cards
1 [Device ]: USB-Audio - C-Media USB Audio Device
C-Media USB Audio Device at usb-0000:00:1d.7-2.4,
full speed

On the working host:
$ cat /proc/asound/cards
0 [Device ]: USB-Audio - USB PnP Sound Device
C-Media Electronics Inc. USB PnP Sound Device at
usb-0000:00:1d.7-2.4, full spe


$ aumix

aumix: error opening mixer: No such file or directory


Any clue why one is mapped to [1] and the other [0], where the one that is
[0] works properly and the [1] does not?


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