Sorry, I don't know anything about the Viewcon... I connect my Korg TR61 to my PC through a 2nd gen Focusrite Scarlett 2i4 external audio interface.
EDIT: There may be a way to make it work, but I don't know how to do it... Someone with more knowledge than I will most likely try to help you, so check back here later.
Out of curiosity, if you arm a virtual instrument track, can you play the virtual instrument with your PSR 8000?
- Joe -
MX 8.1 Pro, Build 418, 64-bit. i5, 1.80GHz, 8GB, Windows 10. Focusrite Scarlett 2i4, Event and PreSonus monitors, Sony MDR-7506, Korg TR61, Akai MPK249, Fender P & J basses, Ric, Strat, D35, stomp boxes and a lot of microphones, etc.