If you need 7.1 surround sound wherever you go, the USB 7.1 channel sound adapter may be for you. Plug in this adapter about as large as 2 AA batteries and you’ll get an emulated 3D sound environment (thanks to the 3D Sound Simulation Software). It also comes with a microphone input for your VoIP, IM calls and multiplayer games.
Even if the virtual 7.1 surround sound is not up to your standards, it could replace the sound card on your notebook if it does not work any more.
The USB 7.1 Channel Sound Adapter is available for approximately $40 USD (£19.95).
Source: Ubergizmo