Looking for some advice. I have a SB-Live value card with only one specific cd-audio input but I have two cd-rom's that I'd like to have audio capability. I took two cables and soldered the ends into a single connector (homemade Y adapter) but that didn't work when both ends were plugged in (though it worked fine when a single end (either of them) was plugged in - which I suspect means that the signal is very low voltage. Any ideas on how to do this? in-line diodes?