I'm trying to mix and record some of my own tracks through my guitar sound effects processor. It has midi, but just for control sequencing, not recording. I have a usb-midi cable interface for controlling my pedalboard, and want to use the sound processor's line level out to my computer's composite in to record my tracks as I play. Eventually, I'd like to upgrade to something with a S/P DIF optical input, as my effects processor has a optical out. If there are sound cards with that. Or I'll have to get a new interface with a D/A converter. I'm really not up to date on computer hardware anymore, and just learning home recording. I'm currently using N-Track Studio software.