Multiple format playback problem and a "simple" fix?
When loading up multiple music files with different formats, PCM and DTS for example, it throws off the processor and you only get static on the DTS file.
"Simple" fix would be to force the Musicbee playback to stop mode rather than gapless when it senses a different format. That way, rather than going gapless it simply stops and then plays. So you will have a gap in playback but the issue is solved and you can load multiple formats to play back successfully.
...another option would be anytime the next track wasn't the same album it could drop out of gapless mode and instead go into a compatibility mode where it would stop and start.