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AU in het kort
AU
AU belongs to an earlier multimedia era where workstation and Unix vendors often had their own practical audio defaults.
M4P in het kort
M4P
M4P belongs to the iTunes-store period when downloadable music was widespread but still strongly shaped by platform-controlled authorization and protection systems.
Formaatvergelijking
| Kenmerk | AU | M4P |
|---|---|---|
| File type | Audio | Audio |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1987 | 2003 |
| Inventor | Sun Microsystems | Apple Inc. |
| Status | active | legacy |
| Primary use cases |
|
|
| Multitrack support | Niet ondersteund | Niet ondersteund |
| HDR support | Niet ondersteund | Niet ondersteund |
| Streaming ready | Niet ondersteund | Ondersteund |
Wanneer je elk formaat gebruikt
When to use AU
- Your source file is already in AU.
- Preserve source expectations before exporting to M4P.
- AU is commonly used in audio workflows.
When to use M4P
- Your target workflow expects M4P.
- Improve delivery compatibility with M4P.
- M4P is commonly used in audio workflows.
Veelgestelde vragen
Why convert AU to M4P?
Legacy playback of DRM-protected iTunes Store purchases from before 2009.
Not applicable to new encoding or distribution workflows.
What changes when converting AU to M4P?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to M4P adds streaming delivery.
What should I review after converting AU to M4P?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.