My program searches for chords across the entire file, all tracks and instruments, although you can specifically exclude one or more instruments (Channels).

Arpeggios may or may not be detected, I will have to try it and see. If not, then maybe an enhancement would be possible.

Not sure what you mean by 'tacit' chords?
Neil

PS Cakewalk (or was it Cubase?) does show the chords at each instant, but that is misleading and impracticable to use, as it can change many times during each beat.