(in-package #:cl-collider)
(in-package #:cl-patterns)

;;; so the copied from supercollider examples is
;; {
;;   var snare, bdrum, hihat;
;;   var tempo = 4;
;;   tempo = Impulse.ar(tempo); // for a drunk drummer replace Impulse with Dust !!!
;;   snare = WhiteNoise.ar(Decay2.ar(PulseDivider.ar(tempo, 4, 2), 0.005, 0.5));
;;   bdrum = SinOsc.ar(Line.ar(120,60, 1), 0, Decay2.ar(PulseDivider.ar(tempo, 4, 0), 0.005, 0.5));
;;   hihat = HPF.ar(WhiteNoise.ar(1), 10000) * Decay2.ar(tempo, 0.005, 0.5);
;;   Out.ar(0, (snare + bdrum + hihat) * 0.4 ! 2)
;; }.play


;; and that didn't work
;; (defsynth snare ()
;;   (out.ar 0 (decay2.ar (pulse-divider.ar 4 4 2) 0.005 0.5))
;;   ;; (white-noise.ar (decay2.ar (pulse-divider.ar 4 4 2) 0.005 0.5))
;;   )
;; (synth :snare)
;; (stop)

;;; advice I got:
;; As for your question about the snare synthdef, pulse-divider doesn't actually generate any triggers on its own, it just outputs a trigger every div triggers. So instead you could try something like this:
(in-package #:cl-collider)
(defsynth snare ()
  (out.ar 0 (white-noise.ar (decay2.ar (pulse-divider.ar (impulse.ar 8) 4 2) 0.005 0.5))))
;; (synth :snare)
;; (stop)
;;
;; yup. that works (in a loop)
;; now I want to figure out that :free thing

;;; continuation of advice
;; But if you just want to use snare in a pattern, I would write it like this:

(in-package #:cl-collider)
(defsynth snare ((amp 0.5) (out 0))
  (out.ar out (* amp (white-noise.ar (env-gen.ar (env (list 0 1 0) (list 0.005 0.5)) :act :free)))))

;; (synth :snare)
;; (stop)
;; that's a bit longer that I'd like


(in-package #:cl-patterns)
(pb :test
  :instrument :snare
  :dur 1
  ;; :amp (pwhite 0.0 0.5)
  :pfindur 4)
;; (play :test)
;; (end :test)
;;
;; ok, that works
;;
;; of the things I really should do, is go and read
;; about Envelope generators, ones that have that :act :free thing
;;
;; one other thing - is to get one or two other drums and mock up a beat

;; well, if I'm doing this in small steps, let's read about envelope
;; and make first snare synth usable in patterns
;;
;; tried to read just about EnvGen  and  Env
;; https://doc.sccode.org/Classes/EnvGen.html
;; https://doc.sccode.org/Classes/Env.html
;;
;; then got directed to the Tutorial, good idea to read it,
;; if not previous "first tutorial", then on concepts:
;; http://doc.sccode.org/Tutorials/Streams-Patterns-Events1.html


;;; So, env-gen takes in lists for intensity and timings, from that builds output signal that can be used in other gens?

(in-package #:cl-collider)
(defsynth env-test-1 ((amp 0.5) (out 0))
  (out.ar out (* amp (sin-osc.ar 440.0 0.0 (env-gen.ar (env (list 0 1 0) (list 0.005 0.5)) :act :free)))))

;; (synth :env-test-1)
;; (stop)

(in-package #:cl-collider)
(defsynth env-test-1-1 ((amp 0.5) (out 0))
  (out.ar out (* amp (sin-osc.ar 440.0 0.0 (env-gen.ar (env (list 0 1 0.1 0) (list 0.005 0.01 0.5)) :act :free)))))

;; (synth :env-test-1-1)
;; (stop)
(in-package #:cl-collider)
(defsynth env-test-2 ((amp 0.5) (out 0) (start 100) (middle 400) (end 200))
  (out.ar out (* amp (sin-osc.ar (env-gen.ar (env (list start middle end) (list 0.5 1.0)) :act :free)))))

;; (synth :env-test-2)
;; (synth :env-test-2 :start 200 :middle 200 :end 200)
;; (synth :env-test-2 :start 200 :middle 300 :end 200)
;; (synth :env-test-2 :start 100 :middle 400 :end 100)
;; (stop)
;;
;; so, yes, env-gen can define stream of numbers by times, and the numbers can be used for example in sin-osc.ar frequency input

;; now, how could I make other percussions? attempting to look at the example from SC

;; {
;;   var snare, bdrum, hihat;
;;   var tempo = 4;
;;   tempo = Impulse.ar(tempo); // for a drunk drummer replace Impulse with Dust !!!
;;   snare = WhiteNoise.ar(Decay2.ar(PulseDivider.ar(tempo, 4, 2), 0.005, 0.5));
;;   bdrum = SinOsc.ar(Line.ar(120,60, 1), 0, Decay2.ar(PulseDivider.ar(tempo, 4, 0), 0.005, 0.5));
;;   hihat = HPF.ar(WhiteNoise.ar(1), 10000) * Decay2.ar(tempo, 0.005, 0.5);
;;   Out.ar(0, (snare + bdrum + hihat) * 0.4 ! 2)
;; }.play
;;
;; so let's try bdrum?

(in-package #:cl-collider)
(defsynth bdrum ((amp 0.5) (out 0)   )
  (out.ar out (* amp (sin-osc.ar (line.ar 120 60 1) 0 (env-gen.ar (env (list 0 1 0) (list 0.005 0.5)) :act :free)))))

;; (synth :bdrum :amp 1)


(in-package #:cl-collider)
(defsynth snare ((amp 0.5) (out 0))
  (out.ar out (* amp (white-noise.ar (env-gen.ar (env (list 0 1 0.3 0) (list 0.005 0.01 0.5)) :act :free)))))

;; (synth :snare)

(in-package #:cl-collider)
(defsynth hihat ((amp 0.5) (out 0))
  (out.ar out (* amp (hpf.ar (white-noise.ar 1) 10000) (env-gen.ar (env (list 0 1 0) (list 0.005 0.5)) :act :free))))
;;   hihat = HPF.ar(WhiteNoise.ar(1), 10000) * Decay2.ar(tempo, 0.005, 0.5);
;; (synth :hihat)

;;; whoa, now I can try to combine these in a pattern!
;; let's just copy another pattern with my instruments maybe?

(in-package #:cl-patterns)
(pb :foo           ;; define a new pattern named :foo
  :instrument :bdrum ;; use the :kik synth we defined above
  :play-quant 4 ;; make sure the pattern will only start on a beat that is divisible by 4, to stay in sync
  :dur 2        ;; give each event a duration of 1 beat
  :pfin 2 ;; limit the length of the pattern to 4 events (the default is infinite events)
  )
;; (play :foo)
;; (end :foo)

(pb :fee           ;; define a new pattern named :foo
  :instrument :hihat ;; use the :kik synth we defined above
  :play-quant 4 ;; make sure the pattern will only start on a beat that is divisible by 4, to stay in sync
  :dur 3        ;; give each event a duration of 1 beat
  :pfin 1 ;; limit the length of the pattern to 4 events (the default is infinite events)
  )
;; (play :fee)
;; (end :fee)

(pb :fum           ;; define a new pattern named :foo
  :instrument :snare ;; use the :kik synth we defined above
  :play-quant 4 ;; make sure the pattern will only start on a beat that is divisible by 4, to stay in sync
  :dur 0.5        ;; give each event a duration of 1 beat
  :pfin 8 ;; limit the length of the pattern to 4 events (the default is infinite events)
  :amp 0.1
  )
;; (play :fum)
;; (end :fum)

(pdef :all-parallel (ppar (list (pdef :foo) (pdef :fee) (pdef :fum))))
;; (play :all-parallel)
;; (end :all-parallel)
;;

;; (in-package #:cl-patterns)
;; (render (pdef :all-parallel) "/tmp/perc-1.aiff" :dur 16)
;; doesn't work for some reason
;; let's write as I did previously, and maybe ask a question later

(in-package #:cl-collider)
(defsynth disk_writer ((out_buf_num 99))
    (disk-out.ar out_buf_num (in.ar 0)))

(setf mybuffer (buffer-alloc (expt 2 17)))
mybuffer

;; start a disk_writer synth
(setf writer_0 (synth 'disk_writer))

;; make it output to buffer you allocated
(ctrl writer_0 :out_buf_num (bufnum mybuffer))

;; continuously write the buffer contents to a file
(buffer-write mybuffer "/tmp/foo.aiff" :leave-open-p t)

;; now play whatever sounds you like

;; stop the disk_writer synth
(free writer_0)

;; close and free the buffer
(buffer-close mybuffer)
(buffer-free mybuffer)
;; wow, now that's a success
;; question on how to write
;; and what else?