The source code was shared at one point. I'm pretty sure I downloaded it as well. I will try to find it at home (I'm at work).
The thing I would like is to be able to RDAC encode wav files so we could go back and forth. I think they were worried that it would violate some legality. I think the encoding code was actually in there but commented out.
I did ask in one thread if he would put the code up publicly.