Could you possibly link usb8x with realsound? Then, you could literally have an .wav player on you calculator!!!
I think the unreleased RealSound 2 has that feature. But JimE seems to have disappeared...
Not to mention if the song is greater than the memory, you have to put it in parts >.<
Yeah, he was, he had it rigged up that you could stream music straight from the USB port. If you want to know the whole story, there is a thread for RS2 here