#lang scribble/manual
@(require (for-label racket))

@title{(duty rate duration reset doneAction level)}


demand results from demand rate ugens

A value is demanded from each ugen in the list and output according
to a stream of duration values.  The unit generators in the list
should be 'demand' rate.  When there is a trigger at the reset
input, the demand rate ugens in the list and the duration are
reset.  The reset input may also be a demand ugen, providing a
stream of reset times.

duration: time values. Can be a demand ugen or any signal.  The
next value is acquired after the duration provided by the last time
value.
		
reset: trigger or reset time values. Resets the list of ugens and
the duration ugen when triggered.  The reset input may also be a
demand ugen, providing a stream of reset times.

doneAction: a doneAction that is evaluated when the duration stream
ends.

level: demand ugen providing the output values.


@racketblock[
(let* ((f (duty kr
		(drand dinf (mce3 0.01 0.2 0.4))
		0
		2
		(dseq dinf (make-mce (list 204 400 201 502 300 200)))))
       (o (sin-osc ar (mul f (mce2 1 1.01)) 0)))
  (audition (out 0 (mul o 0.1))))
]


@racketblock[
(let* ((f (duty kr
		(mouse-x kr 0.001 2 1 0.1)
		0
		2
		(dseq dinf (make-mce (list 204 400 201 502 300 200)))))
       (o (sin-osc ar (mul f (mce2 1 1.0)) 0)))
  (audition (out 0 (mul o 0.1))))
]