Locks up here with my Delfina Lite, too. I think it only works with the Flipper. It's open source, though - I wish someone with sufficient skill would put it back into development...
I read on Amibay that a user with a Lite card and a A3000T installed them and it worked fine. Said it removed a bit of hiss in playback.
4.16 B3 Patch #2 has been rock solid and produces beautiful sound with MHI and AmigaAmp, but always looking for a little better. I pmed him, but I thought I would ask other users..
Try this test Matt, turn the volume off on the player and turn up your speakers, I hear a background "zzz" noise that goes on and off very fast. If I turn off AmigaAmp or stop playing, the noise goes away. Do you have the same noise? Funny before I read his post I didn't notice it, since it isn't that noticeable....