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Hi,

I want an effect like when bells ringing or two mechanical metronomes are started together- the are together (rhythmical unison) than getting out of phase than coming together again..

There are many pieces who make use of such a technique: Ligetis Piece for 100 Metronomes, Phase Music by Steve Reich, many Conlon Nancarrow Pieces..

How can these little ongoing displacements be programmed in OM?

thanks,

ole

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May be like that:

(setf phrase1 (gen-repeat 24 '((16/128 d4 fs4 gs4 b4 a4 fs4 gs4 e4))))
(setf phrase2 (gen-repeat 24 '((8/63 d4 fs4 gs4 b4 a4 fs4 gs4 e4))))

(def-score phases
           (:time-signature '(4 4)
            :key-signature 'atonal
            :tempo 132)

(p1 :omn phrase1 :channel 1 :sound 'gm :program 0)
(p2 :omn phrase2 :channel 2 :sound 'gm :program 0))

 

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is this useful?

;;; piano phase steve reich beginning bars

(setf pitches '(e4 fs4 b4 cs5 d5 fs4 e4 cs5 b4 fs4 d5 cs5))

(setf phase (make-omn
 :length '(1/16)
 :pitch pitches
 :span :pitch))

;;; piano1
(assemble-seq (gen-repeat 4 phase)(gen-repeat 28 phase))

;;; piano2 
(assemble-seq '(-12/16)(gen-repeat 28 phase);in the 28 repetitions the second piano gradually 
;shifts so that after 28 repetitions it is a 16th note later e.g. the f-sharp (second pitch) 
;is sounding together with the e (first pitch) from the 1. piano 


;tempo q.=72

 

Bildschirmfoto 2015-07-16 um 17.11.54.jpg

May be like that:

(setf phrase1 (gen-repeat 24 '((16/128 d4 fs4 gs4 b4 a4 fs4 gs4 e4))))
(setf phrase2 (gen-repeat 24 '((8/63 d4 fs4 gs4 b4 a4 fs4 gs4 e4))))

(def-score phases
    (:time-signature '(4 4)
     :key-signature 'atonal
     :tempo 132)

(p1 :omn phrase1 :channel 1 :sound 'gm :program 0)
(p2 :omn phrase2 :channel 2 :sound 'gm :program 0))

 

Hi Stephane,

I just listened to your example, sounds like it is the direction I would like to go. Thanks!

How did you come up with the length-values, can you explain a little?

best

ole

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Hi Ole,

this example may be more clear on the fact i use only high fractional number for be able to differentiate them by a small difference and by the way, create the phase effect.

Here i use 16/128 value for right hand on 16/126 for left hand, thus creating the phase effect by the small difference between 16/128 and 16/126:

(setf phrase1 (gen-repeat 24 '((16/128 d4 fs4 gs4 b4 a4 fs4 gs4 e4))))
(setf phrase2 (gen-repeat 24 '((16/126 d4 fs4 gs4 b4 a4 fs4 gs4 e4))))

(def-score phases
           (:time-signature '(4 4)
            :key-signature 'atonal
            :tempo 132)

(p1 :omn phrase1 :channel 1 :sound 'gm :program 0)
(p2 :omn phrase2 :channel 2 :sound 'gm :program 0))

best,

Stéphane

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