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1. interval-mapping
   

   interval-mapping

   AM posted a topic in User Extensions Source Code

   i'm sure that it would also work with tonality-map, but i was interested to code a simple version for my own to understand all the things :-) ;;; i wanted to map every interval-sequence to every possible pitchfield... ;;; all the sequences are "centered" (i needed that for my project) ;;; with :base you could move up and down the center ;;; :pitchfield has to be a OMN-pitch-sequence ;;; FUNCTION (defun interval-projection-on-pitchfield (&key pitchfield intervals (base 0)) (let ((integers (pitch-to-integer (interval-to-pitch intervals))) (base-0-integers) (centering) (pos)) (setq base-0-integers (loop for i in integers collect (+ (abs (find-min integers)) i))) (setq centering (if (evenp (find-max base-0-integers)) ;; finds the center of the seq (/ (find-max base-0-integers) 2) (/ (1+ (find-max base-0-integers)) 2))) (loop for i in base-0-integers do (setq pos (+ i (* -1 centering) base)) ;; compensating center & base when (< pos 0) do (setq pos 0) ;; corr if intervals to big (+/-) when (> pos (1- (length pitchfield))) do (setq pos (1- (length pitchfield))) collect (nth pos pitchfield)))) ;;; EXAMPLE (interval-projection-on-pitchfield :pitchfield (append (expand-tonality '(c4 messiaen-mode5)) (expand-tonality '(c5 messiaen-mode5)) (expand-tonality '(c6 messiaen-mode5))) :intervals '(1 2 3 1 2 -4 -3 -2 3 5 7 -2) :base 12) short question: is there a possibilty to build this (append (expand-tonality '(c4 messiaen-mode5)) (expand-tonality '(c5 messiaen-mode5)) (expand-tonality '(c6 messiaen-mode5))) with ONE function (i need more ambitus then 1 octave)... thanx, andré

   • July 15, 20169 yr
   • 7 replies
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     • 2
   • • tonality-map
     • interval-mapping