Years ago I made Dowland's Lord Willoughby's Welcome Home (or something like that?) duetto with a baroque harpist. She was playing from a modern staff notation, and I played from tabulature. Poulton's edition. Worked very well. No problems with the balance. I guess there is quite a lot of lute duetto stuff to be found as tabulature and notation. That repertoire is perhaps one source for you to examine?
All the best, Arto To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
