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;;

;; SEND and RECEIVE OSC MESSAGES

;;

;; Open Sound Control (OSC) is network protocol

;; used by many computer music software applications.

;; For more information see this site:

;; http://www.cnmat.berkeley.edu/OpenSoundControl/

;;

;; This is a simple demo that accepts "/buz/start" and

;; "/buz/stop" messages from external client.

;; The example also includes code for sending

;; from impromptu to itself - or change addy for an

;; external host.

;;

;; Impromptu listens for OSC messages on port 7009

;;

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; clear any existing audio graph info

(au:clear-graph)

; setup simple au graph

(define buz (au:make-node "aumu" "dls " "appl"))

(au:connect-node buz 0 *au:output-node* 0)

(au:update-graph)

(au:midi-out (now) buz *io:midi-pc* 0 57 57)

; Register this process to receive OSC events

(io:osc-register-events)

; Receives "/buz/start" and "/buz/stop" messages

; Prints all other messages to the log

(define (io:osc-receive address . args)

   (cond ((string=? address "/buz/start")

          (start-note (now) buz (car args) (cadr args)))

         ((string=? address "/buz/stop")

          (stop-note (now) buz (car args)))

         (else (print address '-> args))))

; Some test messages to send

(define addy (cons "localhost" 7009))

(io:osc-send (now) addy "/buz/start" 60 80)

(io:osc-send (now) addy "/buz/stop" 60)

(io:osc-send (+ (now) (* *second* 4)) addy "/test/msg" "Hello" 500 6.6 "World")