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SLN at a glance
SLN
Telephony systems often value simple, predictable raw media assets over consumer-facing container polish, which is why formats like SLN remain operationally relevant long after their user-facing visibility disappears.
CAF at a glance
CAF
CAF reflects Apple's effort to modernize audio packaging for pro and system workflows inside its own platform stack.
Format comparison
| Feature | SLN | CAF |
|---|---|---|
| File type | Audio | Audio |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | depends |
| File size characteristics | medium | medium |
| Compatibility | broad | broad |
| Editability | limited | limited |
| Created year | 1999 | 2005 |
| Inventor | Digium (Mark Spencer) | 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 | Supported | Not supported |
When to use each format
When to use SLN
- capture ingest
- editing and mastering
- streaming or playback delivery
- Simple raw representation aligned with telephony workflows.
When to use CAF
- capture ingest
- editing and mastering
- streaming or playback delivery
- Flexible container for Apple audio workflows.
FAQs
Why convert SLN to CAF?
Choose CAF as target when working inside Apple audio pipelines, especially for long recordings, app assets, sound libraries, or technical workflows that benefit from Core Audio compatibility.
What changes when converting SLN to CAF?
Convert to CAF when working inside Apple audio pipelines, especially for long recordings, app assets, sound libraries, or technical workflows that benefit from Core Audio compatibility. It is a good target when AIFF or WAV limitations are inconvenient but Apple tooling is the primary consumer. For general exchange, WAV, AIFF, or M4A are usually easier handoff formats.
What should I review after converting SLN to CAF?
After conversion, review these destination checks: Open converted output in Core Audio tools and verify behavior on real samples; Compare output against the expected depends quality profile; More niche outside Apple ecosystems.
How can I keep quality stable in SLN to CAF conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Often normalized into WAV or other common interchange formats; More niche outside Apple ecosystems; Validate destination compatibility before large-batch conversion.