No comment. Sorry.

	initialization
	setDur:

	sound generation
	mixSampleCount:into:startingAt:leftVol:rightVol: reset samplesRemaining

	accessing	top
	duration Answer the duration of this sound in seconds.
	duration: Scale my envelopes to the given duration. Subclasses overriding this method should include a resend to super.
	samples

	initialization	top
	setDur: Set rest duration in seconds.

	sound generation	top
	mixSampleCount:into:startingAt:leftVol:rightVol: Play silence for a given duration.
	reset Reset my internal state for a replay. Methods that override this method should do super reset.
	samplesRemaining Answer the number of samples remaining until the end of this sound. A sound with an indefinite ending time should answer some large integer such as 1000000.

	instance creation	top
	dur: Return a rest of the given duration.
	pitch:dur:loudness: Return a rest of the given duration.