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function for lengths variation

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Lets say I have 2 measures of music.

I want to make random variations of the rhythms (not the pitches)

The result should fit in the initial 2 measures.

What is the function called for this.

I cannot remember ...

Thanks for help,


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Several possibilities depend what kind of variations you want.

The simplest one is random order applied only to lengths.


(setf mat '((e d4 e4 fs4 gs4 q a4)(s b4 c5 b4 gs4 q a4 e fs4 e4)))
(rnd-order mat :type :length)

Another way I appreciate particularly is length divide:

(length-divide '((3 4)(1 2)) mat :set 'max)

but this last one add some intervals so it may be not what you're searching for...


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produces great results as well:

(length-invert '(1/8 1/8 -1/8 1/4 1/4 -1/8))
=> (-1/8 -1/8 1/8 -1/4 -1/4 1/8)

(length-invert '(1/8 1/8 -1/8 1/4 1/4 -1/8) :swap t)
=> (1/8 1/8 1/4 -1/8 -1/8 1/4)


and works with omn sequence.

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