Practically, a capo will shift each string by a half tone per position, but what does it do to the intervals they produce with each other? My shot is that e.g. * without capo if we fret the simplest chord (about the only one I can play), Em = E2 B2 E3 G3 B3 E4, E-G-B with some harmonics, * and we then transpose one halftone, (capo 1, fret G and B strings on third fret), we'll have F2 C3 F3 G#3 C4 F4. Still a minor chord, with an F fundamental, but I have to admit Wikipedia says Fm is actually not F-G#-C, but F-Ab-C ( https://en.wikipedia.org/wiki/Minor_chord ). Good enough ?
So a few questions:
- Was I lucky in my example chord choice or does it always work like that?
- If there IS a difference, is it all due to temperament?
- If it sounds different (relatively, the halftone shift not considered), is it due to temperament, or to imperfect manual tuning?
- What is actually the temperament when tuning with a spectrum analyzer app? with relative tuning ("5-5-5-4-5")?