On Mon, Nov 28, 2011 at 3:09 PM, gregrwm <tclug1 at whitleymott.net> wrote: > what's that 3rd jack on garden variety soundcards? The three jacks are typically: - stereo line out - mic in - stereo line in At least that's what I've seen. Looking up the manual for your specific card should show you exactly what it is. > midi? Doubtful. > what cable do i need to connect to my yamaha PSR-275? If you just want to dump audio into the computer (for recording, processing, etc.) then you'll just need a quarter-inch stereo (assuming the PSR-275 has a stereo output) to a 3.5mm mini stereo male plug. If the keyboard has separate outputs for L and R then you'll need some sort of wye adaptor. If, on the other hand, you wanted to connect via MIDI, then you'll need to get a USB MIDI adaptor (unless you're able to determine that your soundcard can accept MIDI input. -Erik