Random movement between notes in time frame

[Veit]

Hey everyone,

 

I want to create movement from f1 to c1 in a timeframe of 5 seconds. How can I generate random note values until 5 seconds are reached? Repetitions of notes should also be possible. Here's what I got so far:

 

(make-omn :length (rnd-sample 6 '(s -s e q)) :pitch (midi-to-pitch '(65 64 63 62 61 60)))

 

Thanks in advance,

Veit

 

 

 

 

[AM]

;;; quick-function
(defun make-seq (&key (prob 0.5) (possible-pitches (make-scale 'c4 11))) ;; prob = length/rest-weight 
  (make-omn :pitch (rnd-sample 10 possible-pitches)
            :length (gen-length
                     (loop for i in (rnd-sum-to-size 20 10 '(1 2 3 4 5))
                           collect (if (probp prob)
                                       (* -1 i)
                                     i))
                     '1/16)
            :span :length))

;;; EVAL
(make-seq)

(make-seq :possible-pitches (midi-to-pitch (gen-integer 10 110))) ;; with rnd-pitches

of course... with 60bpm

[opmo]

(setf pitches (rnd-sample 12 (midi-to-pitch '(65 64 63 62 61 60))))

 

If the tempo is 60 then the span is 5/4 etc...

 

(setf lengths (length-span 5/4 (rnd-sample 6 '(s -s e. q))))
(make-omn :length lengths :pitch pitches)

[AM]

smart