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;;

;; 3D SOUND

;;

;; This example moves a sound around a 3d space.

;; For this example we assume a multi-channel device

;; capable of quad output.

;;

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(au:clear-graph)

(define multi-channel-mixer (au:make-node "aumx" "mcmx" "appl" '(4 4) '(4 4))) ;; 4 out 4 in on each bus

(define inst0 (au:make-node "aumu" "dls " "appl" 2 0)) ;; 2 out 0 in

(define inst1 (au:make-node "aumu" "dls " "appl" 2 0)) ;; 2 out 0 in

(define panner0 (au:make-node "aupn" "ambi" "appl" 4 2)) ;; 4 out 2 in

(define panner1 (au:make-node "aupn" "ambi" "appl" 4 2)) ;; 4 out 2 in

(au:connect-node inst0 0 panner0 0)

(au:connect-node inst1 0 panner1 0)

(au:connect-node panner0 0 multi-channel-mixer 0)

(au:connect-node panner1 0 multi-channel-mixer 1)

(au:connect-node multi-channel-mixer 0 *au:output-node* 0)

(au:update-graph)

(au:print-graph)

;; make sure gain on mixer channels is up!

(au:set-param (now) multi-channel-mixer 0 *au:input-scope* 0 1.0)

(au:set-param (now) multi-channel-mixer 0 *au:input-scope* 1 1.0)

(au:set-param (now) multi-channel-mixer 0 *au:output-scope* 0 1.0)

;; open views

(au:open-view multi-channel-mixer #t)

(au:open-view panner0 #t)

(au:open-view panner1 #t)

(define ping

   (lambda (inst pitch)

      (play-note (now) inst pitch 80 4000)

      (callback (+ (now) 5000) 'ping inst pitch)))

(define move

   (lambda (panner azimath elevation distance)

      (let ((a (if (< azimath -180) 180 azimath))

            (e (if (< elevation -90) 90 elevation))

            (d (if (< distance -20.0) 20.0 distance)))

         (au:set-param (now) panner 0 *au:global-scope* 0 a)

         (au:set-param (now) panner 1 *au:global-scope* 0 e)

         (au:set-param (now) panner 2 *au:global-scope* 0 2)

         (callback (+ (now) 2000) 'move panner (- a 1) (- e 1) (- d 0.05)))))

(move panner0 180 90 20)

(move panner1 0 0 5)

(ping inst0 78)

(ping inst1 60)