I am a parser for AIFF (audio interchange file format) files. I can read uncompressed 8-bit and 16-bit mono, stereo, or multichannel AIFF files. I read the marker information used by the TransferStation utility to mark the loop points in sounds extracted from commercial sampled-sound CD-ROMs.

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	edit pitchForKey: sound

	private
	readChunk:size: readCommonChunk: readExtendedFloat readFrom: readInstrumentChunk: readMarkerChunk: readMergedStereoChannelDataFrom: readMonoChannelDataFrom: readMultiChannelDataFrom: readSamplesChunk: readStereoChannelDataFrom:

	reading
	readFrom:mergeIfStereo:skipDataChunk: readFromFile: readFromFile:mergeIfStereo:skipDataChunk:

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	bitsPerSample
	channelCount
	channelData
	channelDataOffset
	frameCount
	gain
	isLooped
	isStereo
	leftSamples
	loopEnd
	loopLength
	markers
	pitch
	rightSamples
	samplingRate

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	pitchForKey: Convert my MIDI key number to a pitch and return it.
	sound Answer the sound represented by this AIFFFileReader. This method should be called only after readFrom: has been done.

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	readChunk:size: Read a AIFF chunk of the given type. Skip unrecognized chunks. Leave the input stream positioned chunkSize bytes past its position when this method is called.
	readCommonChunk: Read a COMM chunk. All AIFF files have exactly one chunk of this type.
	readExtendedFloat Read and answer an Apple extended-precision 80-bit floating point number from the input stream.
	readFrom: Read AIFF data from the given binary stream.
	readInstrumentChunk:
	readMarkerChunk:
	readMergedStereoChannelDataFrom: Read stereophonic channel data from the given stream, mixing the two channels to create a single monophonic channel. Each frame contains two samples.
	readMonoChannelDataFrom: Read monophonic channel data from the given stream. Each frame contains a single sample.
	readMultiChannelDataFrom: Read multi-channel data from the given stream. Each frame contains channelCount samples.
	readSamplesChunk: Read a SSND chunk. All AIFF files with a non-zero frameCount contain exactly one chunk of this type.
	readStereoChannelDataFrom: Read stereophonic channel data from the given stream. Each frame contains two samples.

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	readFrom:mergeIfStereo:skipDataChunk: Read the AIFF file of the given name. If mergeFlag is true and the file contains stereo data, then the left and right channels will be mixed together as the samples are read in. If skipDataFlag is true, then the data chunk to be skipped; this allows the other chunks of a file to be processed in order to extract format information quickly without reading the data.
	readFromFile: Read the AIFF file of the given name.
	readFromFile:mergeIfStereo:skipDataChunk: Read the AIFF file of the given name. See comment in readFromStream:mergeIfStereo:skipDataChunk:.