Has anyone here ever thought about turning the second digital output / AC-3 input into another SP/DIF input? I'd assume that the AC3-RF board does nothing but turn AC3-RF into a normal SP/DIF signal. Additionally, I'd think that it doesn't even have a mechanism to announce its presence, since one has to change jumpers elsewhere on the mainboard to make the card accessible. If things actually are that easy, all one would have to do would be to connect the input signal and ground pins of the AV32R mainboard with the output signal and ground (and pull the mute signal to 5V or gnd, depending on if it is GND or !GND) to get another input. I have a AC3-RF board, but no LD-Player for testing. If anyone has a Laserdisc player, an AV32R, a scope and some spare time, I'll pay for shipping the AC3 card both ways.