inserting on bar/beat

take it as a sketch... you can see the input/output

greetings andré

p.s. could be nice, if we combine it with a/the/my overwrite-function

p.s.s an overwrite-function could be very very smart for work... think: for example: you have coded some music but you would overwrite the last two quaternotes of bar  5 in the violin.... !?

;;; ------------------------------------------------------------------------
;;; INSERTING ON BAR/BEAT
;;; ------------------------------------------------------------------------



(defun inserting-on-bar/beat (insert &key time-sign bar beat)
  (let ((extra-rest (* -1 (/ (- (car beat) 1) (cadr beat))))
        (basic-time-sign time-sign)
        (time-sign (if (listp (car time-sign))
                          (loop for i in time-sign
                            when (> (caddr i) 1)
                            append (loop repeat (caddr i)
                                     collect (list (car i) (cadr i)))
                            else collect (list (car i) (cadr i)))
                          (append time-sign))))
                          
  (omn-to-time-signature
   (length-rest-merge
    (flatten 
     (append (if (> bar 1)
               (list (if (listp (car time-sign))
                       (loop repeat (- bar 1)
                         for i in time-sign
                         collect (* -1 (/ (car i) (cadr i))))
                       (* -1 (1- bar) (/ (car time-sign) (cadr time-sign))))))
             (length-rational-quantize 
              (if (/= 0 extra-rest)
                (append (list extra-rest) insert)
                insert)
              :round  (if (listp (car time-sign))
                        (/ (car (nth bar time-sign)) (cadr (nth bar time-sign)))
                        (/ (car time-sign) (cadr time-sign)))))))
   basic-time-sign)))





;;; ------------------------------------------------------------------------
;;; INSERTING ON BAR/BEAT
;;; ------------------------------------------------------------------------

(inserting-on-bar/beat '(s c4 d4 e4 f4 pp) 
                         :time-sign '(4 4)
                         :bar 2
                         :beat '(3 16))

(inserting-on-bar/beat '(5q c4 d4 e4 f4 pp) 
                         :time-sign '(4 4)
                         :bar 2
                         :beat '(2 20))

(inserting-on-bar/beat '(3q c4 d4 e4 f4 pp) 
                         :time-sign '(4 4)
                         :bar 1
                         :beat '(5 12))

  
(inserting-on-bar/beat '(s c4 d4 e4 f4 pp) 
                         :time-sign '((2 4 1) (3 8 1) (5 8 1) (3 4 1))
                         :bar 3
                         :beat '(3 16))