I will post this in Powertracks forum, but thought maybe Brian C. could help me on this. Proteus works fine in BIAB when configured as you describe. My problem in Powertracks 12 is this. When set up the same way, three things happen.
1. Proteus plays out of tune. I can't figure that one out
2. Does not play in time. I'm sure that is a latency adjustment to be made
3. The notes play staccato whether they are supposed to or not
Thanks