I am revisiting this thread, now as the frustrated owner of a Korg chromatic tuner CA-30, given to me by a kind (and exasperated) friend. As it's the tuner suggested by Blue Lion, I feel the problem must be with me, not the tuner, but I've just about given up on the thing. I can't get even one string on my guitar to stabilize on the right note, and it's even worse on the bass dulcimer. I can't even imagine trying to tune my loaner autoharp.

Having said that, I really appreciate all the input on this thread. Some of it is over my head (i.e., have no idea the implications of "chromatic" tuner). I'll keep trying...obviously a lot of people find these things useful. But my guitar sounds like hell when I get it as close to in tune with the Korg as I can. I do think that my guitar, at least, sounds best when it's in concert pitch, rather than the retuning/capo sound when I pitch it to my voice. While subtle, the tone is somehow more rich.

Stu...I loved the idea of using the guitar itself, altho not quite sure how you manage this. I have often vocalized into the soundhole on my Martin and love the resonance of guitar and voice...now maybe I can also put it to some practical use.