I have Gigabyte's 7VAX MOBO which comes with Realtek OB sound chip.
On Gigabyte's site there's a driver for linux, but it's probably not the way to go with a live distro such as Knoppix.

I searched about this issue and found a question in experts-exchangehttp://www.experts-exchange.com/Deve..._20441229.html

What I could understand from the thread is that if ALSA is added to Knoppix, this kind of problem could be solved, no?