USB Virtual 7.1 Channel External Sound Card Adapter

http://dx.com/p/usb-virtual-7-1-channel-external-sound-card-adapter-59077

Drivers
Windows driver http://sgcdn.startech.com/005329/media/sets/C-Media-CM108_Series_Drivers/CMedia_CM108.zip

Ubuntu driver

MacOS driver

Docs

 * http://sgcdn.startech.com/005329/media/sets/ICUSBAUDIO7_Manual/ICUSBAUDIO7-FR.pdf
 * http://eu.startech.com/media/products/ICUSBAUDIO7/PDFs/ICUSBAUDIO7_Datasheet-FR.pdf