;; (key-state rate keynum minval maxval lag)

;; Report the status of a particular key.  A key is either pressed,
;; or not pressed.

;; The keycode 38 is the A key on my keyboard.  Under X the xev(1)
;; command is useful in determining your keyboard layout.

(audition
 (out 0 (mul (sin-osc ar 800 0)
	     (key-state kr 38 0 0.1 0.5))))