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Found 1 result

  1. JulioHerrlein

    Harmonic Rhythm Question

    Dear All, Stephane did this amazing and clear example (code below) of how to spread an harmonic progression over a predefined texture. This can be altered to any harmonic idiom. I did some test, using a chorale texture originated from a 12-tone row and also a more jazz-oriented chorale. THE QUESTION IS (For Stephane Boussuge) 1) How the harmonic rhythm is controlled here? In the example, the chord changes every half note. 2) How can I make the harmony changes at every quarter note ? 3) Can I use different rates of harmonic rhythms ? Best, Julio ;;; Classical Accompaniment Exemple ;;;--------------------------------------------------------- ;;; Parameters ;;;--------------------------------------------------------- ;;; Motif definition (setf mtf1 '((s c5 leg g5 leg e6 leg g5 c5 leg g5 leg e6 leg g5))) (setf mtf2 (pitch-transpose 4 mtf1)) (setf mtf3 '((-q e5))) (setf mtf4 '((-q g4c5))) (setf mtf5 '((q c2 -))) ;;; Chords definition (setf chords (library 'harmoprog1 'minor-4vx 'prog1)) ;;; Ostinati (setf ost1 (gen-repeat (length chords) mtf1)) (setf ost2 (gen-repeat (length chords) mtf2)) (setf ost3 (gen-repeat (length chords) mtf3)) (setf ost4 (gen-repeat (length chords) mtf4)) (setf ost5 (gen-repeat (length chords) mtf5)) ;;; Tonality-map series (setf tm-path (tonality-series chords)) ;;; Here we apply the map 'tm-path' into arpegio sequence. (setf ost1.map (tonality-map tm-path ost1)) (setf ost2.map (tonality-map tm-path ost2)) ;;; Here we apply our library chords into chord sequence. ;;; The harmonic-path preserves the voice leading. (setf ost3.map (harmonic-path chords ost3)) (setf ost4.map (harmonic-path chords ost4)) (setf ost5.map (harmonic-path chords ost5)) (setf violin1 (ambitus '(g3 c7) ost2.map)) (setf violin2 (ambitus '(g3 c6) ost1.map)) (setf viola (ambitus '(c3 e4) ost3.map)) (setf violoncello (ambitus-chord 12 (pitch-transpose -12 ost4.map))) (setf bass ost5.map) ;;;--------------------------------------------------------- ;;; Score and Layout ;;;--------------------------------------------------------- (def-score Classical-accomp (:title "Classical accompaniment example" :composer "S.Boussuge" :copyright "Copyright © 2018 s.boussuge" :key-signature 'chromatic :time-signature '((1 1 1 1) 4) :tempo 80 :layout (bracket-group (violin-layout 'violin1 :name "Violin-1") (violin-layout 'violin2 :name "Violin-2") (viola-layout 'viola) (violoncello-layout 'violoncello) (contrabass-layout 'bass) ) ) (violin1 :omn violin1 :channel 1 :sound 'gm :program 'String-Ensemble-1 :volume 100 :pan 48 :controllers (91 '(68)) ) (violin2 :omn violin2 :channel 2 :sound 'gm :program 'String-Ensemble-1 :volume 100 :pan 48 :controllers (91 '(68)) ) (viola :omn viola :channel 3 :sound 'gm :program 'String-Ensemble-1 :volume 90 :pan 64 :controllers (91 '(68)) ) (violoncello :omn violoncello :channel 4 :sound 'gm :program 'String-Ensemble-1 :volume 90 :pan 80 :controllers (91 '(68)) ) (bass :omn bass :channel 5 :sound 'gm :program 'String-Ensemble-1 :volume 90 :pan 80 :controllers (91 '(68)) ) )
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