When I did this post, I used the Giant Steps (Coltrane) progression as harmonic path, in this way:
(setf
harmpath '((h (b3 maj7) (d3 7))
(h (g3 maj7) (bb3 7))
(h (eb3 maj7) (eb3 maj7))
(h (a3 m7) (d3 7))
(h (g3 maj7) (bb3 7))
(h (eb3 maj7) (gb3 7))
(h (b3 maj7) (b3 maj7)) (h (f3 m7) (bb3 7))
(h (eb3 maj7) (eb3 maj7)) (h (a3 m7) (d3 7))
(h (g3 maj7) (g3 maj7)) (h (cs3 m7) (fs3 7))
(h (b3 maj7) (b3 maj7)) (h (f3 m7) (bb3 7))
(h (eb maj7) (eb maj7)) (h (cs3 m7) (fs3 7)))
But in the resulting score, the chord symbols won't show.
I have some questions: