:lol: well basically, I don't want to limit its range too much. What I really need for it to do if vary its resistance rapidly by about 100k, as I remember, when I set one control about to max, and the other to midway, when i swept the middle control back and forth fast, it sounded nice 8):lol:
I can get a 4N25 over here. I didn't know an optocoupler could be used like this. So, how would I connect it up? If all else fails, it'll have to be a CDS cell and and LED with a bypass switch, though this is slow and not very variable. Thanks for your help so far btw!