Hmmm...this is interesting. I can't get multitrack audio assignmentss to work with (other-than 1/2 audio ports in) GPO Studio 1.2. If I try setting audio outputs to 3/4 or 5/6 etc, output comes out of 1/2 regardless.

However, this is not a problem in the GPO standalone. There I can set any of the available audio outputs to my heart's content, and it functions with no problems.

I really do prefer GPO studio and would rather not just abandon it to use the standalone or VSTi. This is why I haven't bothered to test the VSTi configuration...I don't plan to use that aspect of GPO (except for a rare attempt to use VSTi and GPO Studio concurrently).

My soundcard is a PC based M-Audio Delta 1010.