On an autoharp, the middle octave sounds pretty good using my old KORG...but the lower notes and to some extent, the higher ones, need some tweaking.... (the "relative tuning" referred to above). I had a discussion with Bryan Bowers 40 years ago where he explained to problem. I DO think that an electronic tuner could/should be designed so that one could adjust it to one's 'relative pitch' (what the ear hears) for each string. I already tune the autoharp 'slightly' below dead center for most lower notes. (I simply don't hear the high notes well enough to bother... but *shrug*.. who can hear teeny differences in most autoharps anyway? ;>))