AM Posted April 24, 2017 Share Posted April 24, 2017 ;;; ----------------------------------------------------------------------------------------------- ;;; A QUASI-UNISONO by proportional length-differences ;;; SAME PITCHES IN ALL VOICES INCLUDING START/END-PITCH ;;; ----------------------------------------------------------------------------------------------- ;;; a random-pitch-seq (rnd-walk) ;;; ;;; immediate-pitch-repetitions are building the rhythm ;;; ;;; with MODIFY-PROPORTIONS i'm generating "proportional variants" of this rhythm, in this example ;;; by 16 generations -> then i take the generations 1, 8, and 15 for each voice ;;; ;;; by "(filter-repeat 1 sequence)" i swallow the immediate-pitch-repetitions for correct ;;; of PITCH- and RHYTHM-phases ;;; ;;; ----------------------------------------------------------------------------------------------- ;;; FUNCTION (defun modify-proportions (n prop-list &key (style 'sharpen)) (let ((rest-pos (loop for i in prop-list for cnt = 0 then (incf cnt) when (< i 0) collect cnt)) (prop-list (abs! prop-list)) (liste)) (progn (setf liste (append (list prop-list) (loop repeat n when (or (= (length (find-above 1 prop-list)) 1) (= (length (find-unique prop-list)) 1)) collect prop-list else collect (setf prop-list (loop for i in prop-list for cnt = 0 then (incf cnt) collect (cond ((= cnt (position (find-closest 2 (find-above 1 prop-list)) prop-list)) (if (equal style 'sharpen) (1- i) (1+ i))) ((= cnt (position (find-max prop-list) prop-list)) (if (equal style 'sharpen) (1+ i) (1- i))) (t i))))))) (loop for i in liste collect (loop for k in i for cnt = 0 then (incf cnt) when (memberp cnt rest-pos) collect (* -1 k) else collect k))))) ;;; ----------------------------------------------------------------------------------------------- ;;; GENERATING SCORE (setf sequence (gen-walk 100 :step '(0 0 0 0 0 0 0 1 2) :start 'c5)) (setf rhy 1/32) ;;; ----------------------------------------------------------------------------------------------- (def-score quasi-unisono (:title "quasi-unisono" :key-signature 'atonal :time-signature '(4 4) :tempo 90) (instr1 :omn (make-omn :length (gen-length (nth 1 (modify-proportions 16 (count-repeat sequence) :style 'sharpen)) rhy) :pitch (filter-repeat 1 sequence)) :channel 1 :port 0 :sound 'gm) (instr2 :omn (make-omn :length (gen-length (nth 8 (modify-proportions 16 (count-repeat sequence) :style 'sharpen)) rhy) :pitch (filter-repeat 1 sequence)) :channel 2 :port 0 :sound 'gm) (instr3 :omn (make-omn :length (gen-length (nth 15 (modify-proportions 16 (count-repeat sequence) :style 'sharpen)) rhy) :pitch (filter-repeat 1 sequence)) :channel 3 :port 0 :sound 'gm)) there is no BUG when i work without "omn-to-time-signature", but is also not necessary! opmo 1 Quote Link to comment Share on other sites More sharing options...
opmo Posted April 24, 2017 Share Posted April 24, 2017 What kind of bug is it. Quote Link to comment Share on other sites More sharing options...
AM Posted April 24, 2017 Author Share Posted April 24, 2017 not the same number of pitches/rhythms, like phase-shifted Quote Link to comment Share on other sites More sharing options...
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