Thanks for the tips but the problem persists.

The song plays perfectly in the standalone BiaB. It is only in the Mac OS DAW/Plugin version that it sounds wrong. The drums don't sound like drums at all. Neither does the piano. And there appears to be a ton of reverb (sounds as though it is a massive cathedral). I'm using all RealTracks and RealDrums.

I checked the paths in the plugin and they are correct. I even re-selected them and did a rebuild of the styles. At this point I'm out of ideas. It was working perfectly a few weeks ago but suddenly stopped.