Instances of this class hold the data resulting from compressing a sound. Each carries a reference to the codec class that created it, so that it can reconstruct a sound similar to the original in response to the message asSound.

In order to facilitate integration with existing sounds, a CompressedSoundData instance can masquerade as a sound by caching a copy of its original sound and delegating the essential sound-playing protocol to that cached copy. It should probably be made a subclass of AbstractSound to complete the illusion.

	as yet unclassified
	compressWith: compressWith:atRate: withEToySound:samplingRate:

	asSound
	asSound doControl mixSampleCount:into:startingAt:leftVol:rightVol: reset samples samplesRemaining

	accessing	top
	channels Answer an array of ByteArrays containing the compressed sound data for each channel.
	channels:
	codecName Answer the name of the sound codec used to compress this sound. Typically, this is the name of a class that can be used to decode the sound, but it is possible that the codec has not yet been implemented or is not filed into this image.
	codecName:
	firstSample Answer the firstSample of the original sound.
	firstSample:
	gain Answer the gain of the original sound.
	gain:
	loopEnd Answer index of the last sample of the loop, or nil if the original sound was not looped.
	loopEnd:
	loopLength Answer length of the loop, or nil if the original sound was not looped.
	loopLength:
	perceivedPitch Answer the perceived pitch of the original sound. By convention, unpitched sounds (like drum hits) are given an arbitrary pitch of 100.0.
	perceivedPitch:
	samplingRate Answer the samplingRate of the original sound.
	samplingRate:
	soundClassName Answer the class name of the uncompressed sound.
	soundClassName:

	as yet unclassified	top
	compressWith:
	compressWith:atRate:
	withEToySound:samplingRate:

	asSound	top
	asSound Answer the result of decompressing the receiver.
	doControl
	mixSampleCount:into:startingAt:leftVol:rightVol:
	reset This message is the cue to start behaving like a real sound in order to be played. We do this by caching a decompressed version of this sound. See also samplesRemaining.
	samples
	samplesRemaining This message is the cue that the cached sound may no longer be needed. We know it is done playing when samplesRemaining=0.