No Audya yet, maybe later...
No rewire, but ASIO, WASAPI, VST, SOUNDFONTS
A crazy man is actually sampling all his keyboards for his vArranger
Rewire is essential, for coupling vArranger with your DAW, like ableton live, i even beleive the required libraries to do so are free, would be a great add for the vArranger.
On a serious note, and i have said it before, if you can set up the perfect sounds for your varranger with a VSTrompler you will get everyones ataention on this forum...