AIFF-C Common Compression Types
AIFF supports only uncompressed PCM data. AIFF-C also supports compression audio formats, that can be specified in the "COMM" chunk. The compression type is "NONE" for PCM audio data. The compression type is accompanied by a printable name. Common compression types and names include, but are not limited to:
| Compression Type | Compression Name | Data | Source |
|---|---|---|---|
| NONE | not compressed | PCM, big-endian | Apple, Inc. |
| sowt | not compressed | PCM, little-endian | Apple, Inc. |
| fl32 | 32-bit floating point | IEEE 32-bit float | Apple, Inc. |
| fl64 | 64-bit floating point | IEEE 64-bit float | Apple, Inc. |
| alaw | ALaw 2:1 | 8-bit ITU-T G.711 A-law | Apple, Inc. |
| ulaw | µLaw 2:1 | 8-bit ITU-T G.711 µ-law | Apple, Inc. |
| ALAW | CCITT G.711 A-law | 8-bit ITU-T G.711 A-law (64 kbit/s) | SGI |
| ULAW | CCITT G.711 u-law | 8-bit ITU-T G.711 µ-law (64 kbit/s) | SGI |
| FL32 | Float 32 | IEEE 32-bit float | SoundHack & Csound |
| ADP4 | 4:1 Intel/DVI ADPCM | SoundHack | |
| ima4 | IMA 4:1 | ||
| ACE2 | ACE 2-to-1 | Apple IIGS ACE (Audio Compression/Expansion) | |
| ACE8 | ACE 8-to-3 | ||
| DWVW | Delta With Variable Word Width | TX16W Typhoon | |
| MAC3 | MACE 3-to-1 | Apple, Inc. | |
| MAC6 | MACE 6-to-1 | Apple, Inc. | |
| Qclp | Qualcomm PureVoice | Qualcomm | |
| QDMC | QDesign Music | QDesign | |
| rt24 | RT24 50:1 | Voxware | |
| rt29 | RT29 50:1 | Voxware |
Read more about this topic: Audio Interchange File Format
Famous quotes containing the words common, compression and/or types:
“Nobody can deny but religion is a comfort to the distressed, a cordial to the sick, and sometimes a restraint on the wicked; therefore whoever would argue or laugh it out of the world without giving some equivalent for it ought to be treated as a common enemy.”
—Mary Wortley, Lady Montagu (1689–1762)
“The triumphs of peace have been in some proximity to war. Whilst the hand was still familiar with the sword-hilt, whilst the habits of the camp were still visible in the port and complexion of the gentleman, his intellectual power culminated; the compression and tension of these stern conditions is a training for the finest and softest arts, and can rarely be compensated in tranquil times, except by some analogous vigor drawn from occupations as hardy as war.”
—Ralph Waldo Emerson (1803–1882)
“If there is nothing new on the earth, still the traveler always has a resource in the skies. They are constantly turning a new page to view. The wind sets the types on this blue ground, and the inquiring may always read a new truth there.”
—Henry David Thoreau (1817–1862)