(in-package :sc)
(setf *sc-synth-program* "...")  ;; scsynth program path.
(push "..." *sc-plugin-paths*)   ;; scx file's path.
(push "..." *sc-plugin-paths*)   ;; it support extensions
(setf *sc-synthdefs-path* "...") ;; your synthdef file will write here

(defparameter *s* (make-external-server "localhost" :port ... :just-connect-p nil))
(server-boot *s*)
;;....hack music.....
(server-quit *s*)

(defsynth sine-wave ((note 60))
  (let* ((freq (midicps note))
            (sig (sin-osc.ar [freq (+ freq 2)] 0 .2)))
    (out.ar 0 sig)))

(defparameter *synth* (sine-wave))
(ctrl *synth* :note 72)
(bye *synth*)

(proxy :sinesynth
   (sin-osc.ar [440 441] 0 .2))

(proxy :sinesynth
   (with-controls ((lfo-speed 4))
      (sin-osc.ar (* [440 441] (range (lf-pulse.ar [lfo-speed (+ lfo-speed .2)]) 0 1)) 0 .2))
   :fade-time 8.0)

(ctrl (proxy :sinesynth) :lfo-speed 8)
(ctrl (proxy :sinesynth) :gate 0)

(defsynth saw-synth ((note 60) (dur 4.0))
   (let* ((env (env-gen.kr (env [0 .2 0] [(* dur .2) (* dur .8)]) :act :free))
             (freq (midicps note))
    		 (sig (lpf.ar (saw.ar freq env) (* freq 2))))
	  (out.ar 0 [sig sig])))

(defun make-melody (time n &optional (offset 0))
   (when (> n 0)
      (at time (saw-synth :note (+ offset (alexandria:random-elt '(62 65 69 72)))))
      (let ((next-time (+ time (alexandria:random-elt '(0 1 2 1.5)))))
        (callback next-time #'make-melody next-time (- n 1) offset))))

(make-melody (quant 4) 16)
(make-melody (+ 4 (quant 4)) 16 12)

(setf *synth-definition-mode* :load)

;; re-define saw-synth. it's synthdef file write to *sc-synthdefs-path*.
(defsynth saw-synth ((note 60) (dur 4.0))
   (let* ((env (env-gen.kr (env [0 .2 0] [(* dur .2) (* dur .8)]) :act :free))
             (freq (midicps note))
             (sig (lpf.ar (saw.ar freq env) (* freq 2))))
	  (out.ar 0 [sig sig])))

;; redering audio-file.
(with-rendering ("~/Desktop/foo.aiff" :pad 60)
  (make-melody 0.0d0 32)
  (make-melody 8.0d0 32 12)
  (make-melody 16.0d0 32 24))