konradh
Thanks, everyone. I was able to roll back and I do have audio again.
Until I am positive I can get things working on Win 10, how do I block another forced upgrade?
From what you describe, you don't currently have a backup image file of the current OS install.
That would be one of the first things I'd do...
You always have a means of quickly/easily getting back to a properly functioning DAW.
Once you've got your backup image file, there's no worry about installing Win10.
You can get Win10 to work (just going to take a little extra time/effort for the VS-700).
If you get into a bind, you can always reload your backup image file.