Enabling external sound card for VU+ duo2

[hsivakci]

Hi,

I have SoundBlaster Audigy 2 NX external sound card. I would like to enable by using a USB port with my receiver.
Output list of lsusb command is below. Could you give me whet user commands in command line I have to use to enable my external sound card.
Could you tell me if it is not possible to use this external card with such box.
I am using VTI 13.012 image.
many thanks in advance.

Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 003: ID 041e:3020 Creative Technology, Ltd SoundBlaster Audigy 2 NX
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 148f:5372 Ralink Technology, Corp. RT5372 Wireless Adapter
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

[cactikid]

Not too sure if usb would work but what about a spdif out of box or tv to input of sound card?

[hsivakci]

the external sound card is muted if it is not enabled. this is why I have to enable it with box. at least it is like that with desktop.
thanks