# [CM] scheme move-locsig

James Hearon j_hearon at hotmail.com
Thu May 5 12:00:49 PDT 2016

```Hi,
I couldn't come up with the magic to get a pan-env working across a heap of notes with move-locsig.  But I made a solution below by just passing degree only to the inst and controlling degree over the total duration of the heap from with-sound.  Not elegant, but it pans across the whole heap of notes.

------------
(provide 'snd-nrev.scm)

(if (provided? 'snd)
(require snd-ws.scm)
(require sndlib-ws.scm))

(define (round-off z n)
(let ((power (expt 10 n)))
(/ (round (* power z)) power)))

(definstrument (myinst start-time duration frequency amplitude sampling-rate revamt distance degree )
(let* ((beg (floor (* start-time sampling-rate)))
(end (+ beg (floor (* duration sampling-rate))))
(loc (make-locsig :degree degree :distance distance :reverb revamt))
(sine-wave (make-oscil :frequency frequency)))
(do ((i beg (+ i 1)))
((= i end))
(let ((x (* amplitude (oscil sine-wave))))
(locsig loc i x)
(move-locsig loc degree distance)
))))

(let ((aaa (make-heap '(360 800.345 1200 600)))
(bbb (make-heap '(1 1 .75 .25 .20 .15 .10 .10 .10 .10))) )
(with-sound (:reverb nrev :output "/home/MyTest.wav" :srate 48000 :channels 2
:header-type mus-riff :statistics #t :play #t)
(let ((i 0))
(let ((mypanenv (make-env '(0 90 5 0) :length 70))) ;not sure why length  works here instead of duration
(do ((k 0 (+ k 1)))
((>= k 40))
(let ((v (next bbb)))
(myinst  i v  (next aaa) .9 48000  0.01  1.0  (mypanenv k)  ) ;send degree to inst
(set! i (+ (round-off i 2) v))
))))) )

```