is there a function to ROTATE a complete omn-sequence? (like a sample) .... 

thanks for help!

Do you mean the omn events <length pitch velocity and articulation>?

Like that:

OMN form rotation:

(setf omn '(q c4 p ten e d4 mp trem s e4 f stacc))

(gen-rotate 1 omn)
=> (s e4 f stacc q c4 p ten e d4 mp trem)

(gen-rotate 2 omn)
=> (e d4 mp trem s e4 f stacc q c4 p ten)

 

yes, but... it has some error...

 

> Error: No length specified before first pitch
> While executing: (:internal parse-omn-note), in process Listener-1(6).
> Type cmd-. to abort, cmd-\ for a list of available restarts.
> Type :? for other options.

 

only when i do gen-rotate with the sequence

the sequence works with perhaps (gen-retrograde seq) or...

 

 

the sequence (produced by rnd-bots) is for example, something like that...

 

((et b1 f gettato t f1 ff ord et cs3 mf gettato t fs3 f tasto d5 tasto et g5 mf gettato t eb7 ff ord et a6 f gettato))

 

and works fine without (gen-rotate

 

There is no error. The GEN-RATOTE is not working with OMN form list now.
What you see above is what you will get with the next update.
Here, the function is working fine already.