Pocketcdg with massive sound problems

When I’m trying to run a .cdg-file, pocketcdg won’t play the mp3, but only produces kind of oldschool-modem-white noise… (while showing the karaoke text and all).

If I remember correctly, this issue didn’t happen with Emuelec 4.5.

Have they changed the core? Any ideas? Thanks for any ideas to solve this problem…