# fixed special rhythms

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when i evaluate this:

```(make-omn
:pitch '(c5)
:length '(3/12 -1/12 4/12 -1/20 3/20 1/20)
:velocity '(mf))```

the result is wrong (look at (3/12 -1/12 4/12).... but i would like to notate something like valeur ajoutée

isn't it possible? thanx a.

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seems to be a bug...

evaluate this:

```(make-omn
:pitch '(c5 c3 c2 c3 c4)
:length '(-2/12 2/12 -1/12 6/12 -1/12 3/12 1/12)
:velocity '(mf))```

after the 6/12 the next value -1/12 is shown as -1/8 in the score

score

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The system will display your expression:

```(make-omn
:pitch '(c5)
:length '(3/12 -1/12 4/12 -1/20 3/20 1/20)
:velocity '(mf))```

even the tuplets are not completed.

As for the second post, yes this is a bug.

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thanx for the anwser...

first example: it's possible to do this, i can realize with "special-bars" like 2/3 or 5/20 - by a little (self-made) lisp-function - so it works...

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a solution: perhaps it's interesting for anyone (or as an example for OPMUSMODUS-implementation) - a simple function (programmed by a friend and myself)  - not very smart but it (should) work(s) :-)

greetings

a.

```(defun time-sign-changes (durations rhys &key (complex-bars 'nil))
(if (equal complex-bars 'nil)
(loop
for i in durations
for j in rhys
with sum = 0
with last-j = (first durations)
when (and (/= j last-j) (/= sum 0))
collect (list (numerator sum) (denominator sum) 1) into bag and do (setq sum 0)
do (setq sum (+ sum (abs (* i j))))
when (> sum 1/4)
collect '(1 4 1) into bag and do (setq sum (- sum 1/4))
do (setq last-j j)
finally (return (append bag (list (list (numerator sum) (denominator sum) 1)))))
(loop
for i in durations
for j in rhys
with sum = 0
with last-j = (first durations)
when (and (/= j last-j) (/= sum 0))
collect (list (numerator sum) (denominator sum) 1) into bag and do (setq sum 0)
do (setq sum (+ sum (abs (* i j))))
when (> sum 1/2)
collect '(1 2 1) into bag and do (setq sum (- sum 1/2))
do (setq last-j j)
finally (return (append bag (list (list (numerator sum) (denominator sum) 1)))))))```

```(setq durations '(-1 2 3 4 3 2 -5 4 3 2 4 3 1 7))
(setq rhythms '(1/32 1/32 1/32 1/32 1/20 1/20 1/20 1/20 1/20 1/12 1/12 1/12))

;;creating the lengths
(setq lengths (loop
for i in durations
for j in rhythms
collect (* i j)))

;; creating the bar-changes -> :complex-bars 'nil or 't
(setq bars (time-sign-changes durations
rhythms
:complex-bars 'nil))```

```(def-score solo
(:title "example"
:key-signature 'atonal
:time-signature bars
:tempo '90
:layout (treble-layout 'example))
(example
:omn  (make-omn
:pitch '(c4)
:length lengths)
:channel 1
:volume 100
:sound 'gm))```

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Good coding indeed :-)

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thanx, but midi don't like such VALUES  :-( - so it works only for notation (or sibelius/finale)...

for the future it would be nice for my work (and perhaps interesting for other composers), when the time/rhythm-things could be more flexible - i think the biggest bounderies in opusmodus are the time/rhythm-things and it's notation (paper/pencil is the most flexible way, and i don't want to be a limited by software). if you work really "experimental" you want to map rhythm-values in a complexer way...

for me it would be great and very nice, when it would be possible to notate/play such rhy-sequences like '(1/4 1/4 1/12 1/12 3/16 1/16....) with values that are not completing 1/4. at the moment OPUSMODUS is "correcting" this... (would be nice to have irregular time-signatures or bars with no time-signature!!!)....

in my work for example: i have programmed BOTS/non-trivial-machines, who are generating values "step-by-step" and the inner-state of the non-trivial-machine always changes its datas/memory (in a rnd-way). the result is, that the rhythm-values all the times are changing (more or less like in the special-bars-examples). and because it's not possible to calculate the output of the non-trivial-machine (that's the natural constitution of them), it's not possible to "fit the rhyhm-values" into prefiexed-bar-structures. that's a problem for my work and so i have to write such strange programs who fix the complicated rhy-changes :-)

andré

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I will look into it soon.

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