Hi
I've been trying to get this new function to work, based on the example given ... but cannot.
What have I missed here?
 

(setf intro '(:c I vi IV V))
(setf verse '(:c I V vi IV ii))
(setf chorus '(:am i iv VI III iv i V7))
(setf bridge '(:eb IV V7/V V7 I vi ii V7 I))
(setf outro '(:c vi IV I ii V7 I IV I))

(setf song-progression
      (append intro verse chorus bridge outro))

(setf attr (make-diatonic-chord-attribute song-progression))

(setf song-chords
      (diatonic-chord
       song-progression
       :inv '(0 -1 0 -1   ; Introduction inversions
              -2 0 -1 0 -1 0 -1 0 -1 -2   ; Verse inversions
              0 -1 -2 0 -1 -2 0   ; Chorus inversions
              0 0 -1 0 -1 -2 0 -1  ; Bridge inversions
              0 -1 -2 0 -1 -2 0  ; Outro inversions
              0 0 0 -1 0 -1 -1 -2)  ; Outro inversions
       :sort t
       :drop 1))

(setf omn-data
  (omn
    :pitch song-chords
    :length '(q q h q
              q h q q q q q q h q
              q q q q q q h
              q h q q q q h q q h
              q q q q q q q h
              h h h q q h h w)
    :articulation attr))

(def-score my-song
  (:key-signature 'chromatic
   :time-signature '(4 4)
   :tempo 120
   :layout (grand-layout 'piano))
 
  (piano
   :omn omn-data
   :channel 1
   :sound 'gm
   :program 'acoustic-grand-piano))

make-omn

 

(setf omn-data
  (make-omn
    :pitch song-chords
    :length '(q q h q
              q h q q q q q q h q
              q q q q q q h
              q h q q q q h q q h
              q q q q q q q h
              h h h q q h h w)
    :articulation attr))

 

and (grand-layout 'piano) is not correct it needs two voices. Change to one voice instrument.

All together:
 

(setf intro '(:c I vi IV V))
(setf verse '(:c I V vi IV ii))
(setf chorus '(:am i iv VI III iv i V7))
(setf bridge '(:eb IV V7/V V7 I vi ii V7 I))
(setf outro '(:c vi IV I ii V7 I IV I))
(setf song-progression (append intro verse chorus bridge outro))
(setf attr (make-diatonic-chord-attribute song-progression))

(setf song-chords
      (diatonic-chord
       song-progression
       :inv '(0 -1 0 -1   ; Introduction inversions
              -2 0 -1 0 -1 0 -1 0 -1 -2   ; Verse inversions
              0 -1 -2 0 -1 -2 0   ; Chorus inversions
              0 0 -1 0 -1 -2 0 -1  ; Bridge inversions
              0 -1 -2 0 -1 -2 0  ; Outro inversions
              0 0 0 -1 0 -1 -1 -2)  ; Outro inversions
       :sort t
       :drop 1))

(setf omn-data
      (make-omn
       :pitch song-chords
       :length '(q q h q
                 q h q q q q q q h q
                 q q q q q q h
                 q h q q q q h q q h
                 q q q q q q q h
                 h h h q q h h w)
       :articulation attr
       ))

(def-score my-song
    (:key-signature 'chromatic
     :time-signature '(4 4)
     :tempo 120
     :layout (treble-layout 'chords))
 
  (chords
   :omn omn-data
   :channel 1
   :sound 'gm
   :program 0))

 

thank you so much!