Get from Amazon.com : http://www.amazon.com/gp/product/B002LITGHM?tag=hawaiianlegac-20

SIIG USB SoundWave 7.1 Digital Audio Adapter IC-710112-S1

Provides external volume and mic controls with mute buttons
2 microphone inputs and 1 stereo headphone output
Supports recording through SPDIF-in Mic Line-in
Supports SPDIF out - provides digital surround sound output
Provides 21 51 71 connection for surround sound speakers
Chipset C-Media CM6206