function for lengths variation

[born]

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,

Achim

[opmo]

(rhythm-series 4 3 3/8)

 

[born]

Is there one working with OMN?

[PatrickMimran]

yes

[Stephane Boussuge]

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...

S.

[born]

Thanks a lot. I found another one as well:

quantum

 

[opmo]

length-invert

 

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.