I'm looking for the pinouts of the jumpers on a C-media 8738 soundcard. I believe there is a standard, though.
The jumpers in question are the audio cd input and the aux input.
I can't find the ground - when i touch each of them, i see the mains hum on the scope, but it reacts to any of the three wires.
Plus, there's one more weird thing - There are 4 pins on the pins, but the cd audio cable has only three (missing second, or third, depends on how you look).
Thanks.