They sell a gizmo that combines a small motor and an electronic tuner, which you place on each tuning peg in turn, and it fiddles with the tension till it's satisfied that you're in tune. You could hook six of them up and it would work, but I'd probably only use it between numbers. While you're nattering on about the ancient agrarian field hand you learned the next number from, it could be tweaking you into DADGAD or some such tuning (like Baghdad tuning -- DADGAB*).

But the weight of the mechanism and the need for power (a wall wart at the very least) would doom it to failure for sure.

Bob

* Arabic is written right-to-left