MATHEMATICA IMPORT/EXPORT FORMAT

AIFF (.aif, .aiff, .aifc)

MIME types: audio/aiff, audio/x-aiff, audio/x-aifc
AIFF digital audio format.
Commonly used in professional audio processing applications and on Macintosh.
AIFF is an acronym for Audio Interchange File Format.
Binary file format.
Stores audio data in uncompressed mono or stereo waveforms.
Supports a variety of bit resolutions and sample rates.
Developed in 1988 by Apple and others.

Import and Export support all audio codecs commonly used in AIFF files.

IMPORT AND EXPORT

Import imports an AIFF file, returning a sound object.

Export exports a sound object to an AIFF file encoded using 16-bit pulse code modulation.

Import gives an expression of the form Sound[SampledSoundList[data, r]].

Export creates an AIFF file from the sound object expr.

Import imports the specified element from an AIFF file.

Import imports a subelement.

Import imports multiple elements.

The import format can be specified with Import or Import.

Export creates an AIFF file by treating expr as specifying element elem.

Export treats each as specifying the corresponding .

Export exports expr with the specified option elements taken to have the specified values.

Export uses rules to specify the elements to be exported.

See the reference pages for full general information on Import and Export.

ImportString and ExportString support the AIFF format.

ELEMENTS

General Import elements:

	"Elements"	list of elements and options available in this file
	"Rules"	full list of rules for each element and option
	"Options"	list of rules for options, properties, and settings

Data representation elements:

	"Data"	raw audio samples, given as a list of real numbers, each sublist representing an individual audio channel
	"SampledSoundList"	sound data given as a SampledSoundList object
	"Sound"	sound data given as a Sound object

The element corresponds to the first argument of SampledSoundList.

Multiple channels are represented as an array of audio samples.

Import and Export use the element by default for AIFF files.

Advanced Import element:

"SampleRate"

number of amplitude samples per second and channel

OPTIONS

General Export option:

SampleRate

Automatic

number of amplitude samples per second for each channel

Detailed properties and settings:

	"AudioChannels"	Automatic	the number of audio channels in the file
	"AudioEncoding"	"Integer16"	how samples are encoded

If the sample rate is not specified when exporting to WAV, the highest sample rate occurring in the exported sound is used, and all sounds are resampled as necessary.

If the number of channels is unspecified, the highest number of simultaneous channels is taken, and silence is inserted if necessary.

If is set to a value n which is less than the number of channels to be exported, only the first n channels are exported.

The AIFF format normally uses PCM (pulse code modulation) audio encoding, but also supports various other codecs.

can be set to any of the following codecs:

	"UnsignedInteger8"	Unsigned 8-bit PCM
	"Integer8"	8-bit PCM
	"Integer16"	16-bit PCM
	"Integer24"	24-bit PCM
	"Integer32"	32-bit PCM
	"IMA-ADPCM"	adaptive differential PCM
	"Real32"	32-bit IEEE floating point
	"Real64"	64-bit IEEE floating point
	"aLaw"	a-Law 4-bit PCM (ITU-T G.711 standard)
	"uLaw"	-Law 4-bit PCM (ITU-T G.711 standard)
	"GSM610"	GSM 6.10 codec (ETSI 6.10 standard)
	"DWVW-12"	12-bit DWVW
	"DWVW-16"	16-bit DWVW
	"DWVW-24"	24-bit DWVW

Not all codecs support arbitrary sample rates and channel specifications.