I have a chance at an old Disney Sound Source external parallel port sound card I am uncertain where to find drivers and I have a feeling it won't work on an XT, is it worth messing with?
The only programs I ever found with SoundSource support were the (st00pit, boring, over-priced) progs from Disney themself.
I recently grabbed one of these off of ebay for $10 shipped, but haven't had the time to mess with it yet. Bought it because I've never seen/heard a Disney Sound Source (or the Covox Speech Thing), it was cheap, and I've a boatload of software that supports it.
FWIW, it wasn't just Disney that supported the product, but Sierra as well. I want to say that several popular shareware titles also supported it (if memory serves, it was Apogee games that I'm thinking of)