Audio Interchange File Format: Difference between revisions
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(Described the sample rate format a bit) |
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| Line 31: | Line 31: | ||
! scope="col" | Value | ! scope="col" | Value | ||
! scope="col" | Bitset | ! scope="col" | Bitset | ||
|- | |||
| 8000 || 0x400BFA00000000000000 | |||
|- | |- | ||
| 44100 || 0x400EAC44000000000000 | | 44100 || 0x400EAC44000000000000 | ||
Latest revision as of 16:33, 13 August 2018
- Extensions: aif, aiff
- Company: Apple
- Official Specification: http://multimedia.cx/mirror/AudioIFF1_2_1.htm
- MIME Types:
- aif, aiff: audio/aiff, audio/x-aiff, or audio/x-pn-aiff
- Samples: http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/AIFF/Samples.html
AIFF files exclusively store audio data. They serve as somewhat of an Apple analog of the Microsoft Wave format.
Comprehensive AIFF tag listing: http://hul.harvard.edu/jhove/aiff-hul.html
Sample Rate
The sample rate is stored as an extended precision float (80 bits, 10 bytes)
| Type | Size |
|---|---|
| SignBit | 1 bit. |
| Exponent | 15 bits. |
| Mantissa | 64 bits. |
| Value | Bitset |
|---|---|
| 8000 | 0x400BFA00000000000000 |
| 44100 | 0x400EAC44000000000000 |
| 48000 | 0x400EBB80000000000000 |
| 88200 | 0x400FAC44000000000000 |
| 96000 | 0x400FBB80000000000000 |
| 192000 | 0x4010BB80000000000000 |