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AU at a glance
AU
AU belongs to an earlier multimedia era where workstation and Unix vendors often had their own practical audio defaults.
AIFF at a glance
AIFF
AIFF belongs to the earlier era of digital audio workstations and multimedia systems where platform ecosystems shaped preferred interchange formats.
Format comparison
| Feature | AU | AIFF |
|---|---|---|
| File type | Audio | Audio |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | depends |
| File size characteristics | medium | medium |
| Compatibility | broad | broad |
| Editability | limited | limited |
| Created year | 1987 | 1988 |
| Inventor | Sun Microsystems | Apple |
| Status | active | active |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | moderate |
| Metadata handling | moderate | moderate |
| Delivery profile | strong | strong |
| Workflow fit | delivery | delivery |
| Multitrack support | Not supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use AU
- capture ingest
- editing and mastering
- streaming or playback delivery
- Historically important in Unix/workstation audio.
When to use AIFF
- capture ingest
- editing and mastering
- streaming or playback delivery
- Strong historical place in pro and Apple audio workflows.
FAQs
Why convert AU to AIFF?
Choose AIFF as target when the recipient needs high-fidelity editable audio for production, mastering, archiving, or sample-based workflows, especially in Apple-heavy or studio environments.
What changes when converting AU to AIFF?
Convert to AIFF when the recipient needs high-fidelity editable audio for production, mastering, archiving, or sample-based workflows, especially in Apple-heavy or studio environments. It is a strong target when preserving PCM quality matters more than storage size. For lightweight delivery, AAC or MP3 are usually better suited.
What should I review after converting AU to AIFF?
After conversion, review these destination checks: Open converted output in pro audio tools and verify behavior on real samples; Compare output against the expected depends quality profile; Larger than compressed delivery formats.
How can I keep quality stable in AU to AIFF conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Less universal than WAV in some modern cross-platform workflows; Larger than compressed delivery formats; Validate destination compatibility before large-batch conversion.