Dear all-- I have just created a new semi-tone device for a Jauck type baroque lute. This allows me to change the pitch of bass strings by a half step without tuning. I can go from say e-flat minor to A-major in just a few seconds with complete stability.
A similar semi-tone device is seen on the 1732 lute by J.H. Goldt,(formerly in the V&A) of course I don't know when it was added. Also Hans Neeman and his associates used semi-tone devices on all their baroque lutes including bass rider lutes in the 1930s. (This I know from a photograph of Neeman and his lutes). If anyone is interested I can send pics of my new device. Sterling To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html