A project like this would have to be a kernel hack unless the empeg guys do it since we don't have their player source. I don't know much about linux kernel internals, but it seems like this should be possible.

I too feel like it should be possible. An alternative to a kernel hack might be a library that sits between the player and the standard C library and changes data going to the audio device. You can use the partially linked player binary to achieve this. Doing it this way won't be necessarily easier, just more obvious for somebody with UNIX programming experience but no kernel hacking experience.

Borislav