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Harmonizing a major scale using 4-part-drop-2 inversion x

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Is there a more elegant way to do this?


;; create major scale
(defun majorScale (root) (make-scale root 16 :alt '(2 2 1 2 2 2 1)))
;; usage:
(majorScale 'c4)

;; 4 part root position harmony of every degree of a major scale
(defun harmonizeMajorScale (root) (harmonic-progression '(0 1 2 3 4 5 6 7) (majorScale root) :size 4))
;; usage:
(harmonizeMajorScale 'c4)

;; 4 part drop 2 of every degree of a major scale, with every chord in a specific inversion
(defun 4PartDrop2 (chords inversion)
 (loop for chord in chords
       (pitch-transpose-n '(0 0 -12 0) 
             (chord-inversion inversion chord)
;; usage:
(4PartDrop2 (harmonizeMajorScale 'c4) 3)

Any advice very much appreciated.


Kind regards,


Wim Dijkgraaf

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Thanks Stephane for your reply. Interesting solution!


If I'm not mistaken, your solution doesn't include the Drop 2 (transpose second voice from the top an octave down). Any idea how to incorporate that into this approach?


Kind regards,


Wim Dijkgraaf

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Hi Wim,


a possible solution:


(setf chords (mclist 
               (lambda(x)   ;; mapcar will apply the inversion to each chord
                 (chord-inversion 3 x)) 
               (harmonic-progression  ;; harmonic progression definition
                (integer-transpose -1 '(1 2 3 4 5 6 7)) ;;degree for the chords
                '(c4 major)   ;; scale used
                :size 4     ;; chords size

(setf drop2 (chordize-list
              '(0 0 -12 0)
              (pitch-melodize chords))))


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