..... I use the transposer button (on a kn6000) quite a bit..... for midis not originally done in my vocal key, for guest singers who don't sing in the key I play the tune in (I really admire those of you who can play a tune in 'any' key ... if I'm doing a tune with a 'guest vocalist' I want to concentrate on what they are doing, and not on the transposition of the tune), AND for myself on those really busy weekends, and nights when the voice isn't quite where it should be ... just drop the key down a notch and everything's fine ...
t.