| br>Interesting question...
Regarding frying the circuitry... while it's not impossible (don't plug it into your mains!), the inputs are over and under voltage protected.
The only issue is that unlike a mixer's "no input mixing" process, where the circuit is 100% analog, the 'b is 100% digital from in to out, so you'll have to write some code that reads/writes.
Most of the code I've written samples the inputs at rates in the millisecond range as input parameters. If you want to sample an audio rate signal, then it'll take a bit more work. Someone has posted a couple of samples here I believe... using a timer to get up to 1Ms/sec depending on what else you're doing to the signal.
-s br> br>