How to get C-Media USB Sound adapter 0d8c:000c working as primary sound card in Debian Linux?

I have a cheap USB Sound Adapter bought from Amazon, plugged in this with my QNAP TS-110 NAS box. This NAS box is going to serve as Table top Media center also. You can refer this post for more info on this. I have installed Debian Squeeze (6.0) testing branch. The kernel is 2.6.32 on this arm architecture.

$ uname -a

Linux debian 2.6.32-5-kirkwood #1 Sat Sep 18 15:20:08 UTC 2010 armv5tel GNU/Linux

[   30.406340] usb 1-1.2: new full speed USB device using orion-ehci and address 3

[   30.527515] usb 1-1.2: New USB device found, idVendor=0d8c, idProduct=000c

[   30.534438] usb 1-1.2: New USB device strings: Mfr=0, Product=1, SerialNumber=0

[   30.541883] usb 1-1.2: Product: C-Media USB Headphone Set

[   30.573852] usb 1-1.2: configuration #1 chosen from 1 choice

$ lsusb

………

Bus 001 Device 003: ID 0d8c:000c C-Media Electronics, Inc. Audio Adapter

Here is the list of modules loaded automatically.

$ lsmod | grep snd

snd_usb_audio          59236  0

snd_pcm                56903  1 snd_usb_audio

snd_page_alloc          4891  1 snd_pcm

snd_usb_lib            14384  1 snd_usb_audio

snd_seq_midi            4274  0

snd_seq_midi_event      4610  1 snd_seq_midi

snd_rawmidi            15833  2 snd_usb_lib,snd_seq_midi

snd_hwdep               5140  1 snd_usb_audio

snd_seq                43935  2 snd_seq_midi,snd_seq_midi_event

snd_timer              15962  2 snd_pcm,snd_seq

snd_seq_device          4983  3 snd_seq_midi,snd_rawmidi,snd_seq

snd                    42948  7 snd_usb_audio,snd_pcm,snd_rawmidi,snd_hwdep,snd_seq,snd_timer,snd_seq_device

soundcore               4753  1 snd

usbcore               122115  6 snd_usb_audio,snd_usb_lib,udlfb,usbhid,ehci_hcd

# apt-get install alsa-tools alsa-oss alsa-utils

$ alsamixer

cannot open mixer: No such file or directory