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AU to MKA - Online Audio Converter
Convert AU to MKA online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AU to MKA
Drop AU audio here or click to select
AU
MKA (Matroska)
About AU to MKA
Convert AU to MKA. AU is Sun's simple container, usually holding 8 kHz telephony audio. MKA is the Matroska audio-only container for tracks and chapters. Only selected tracks carry over, so pick language first..
Why convert AU to MKA?
- Flexible size with MKA lossless or lossy compression - lossy for smaller files, lossless for exact quality.
- Keep quality where supported.
- Private, no upload - runs in your browser.
AU vs MKA
| Codec | PCM 16-bit | Matroska |
|---|---|---|
| Compression | uncompressed | lossless or lossy |
| Sample behavior | Full quality kept | Depends on the track inside |
| Typical use | AU is Sun's simple container, usually holding 8 kHz telephony audio. | MKA is the Matroska audio-only container for tracks and chapters. |
When not to convert AU to MKA
- Skip MKA for archival masters: lossy compression discards detail, so keep the AU original.
- Keep a master copy: repeated exports stack small losses, so archive AU before batch MKA shares.
Limits
Starting point: AU - AU is Sun's simple container, usually holding 8 kHz telephony audio. Headers are minimal; verify sample rate after conversion. Only selected tracks carry over, so pick language first. Encode MKA (Matroska) from AU at 256k for music or 128k for speech, starting from the master.
How conversion works
Conversion runs entirely in your browser with FFmpeg WASM. Files never leave your device.
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FAQ
How do I convert AU to MKA?
Drop your AU file onto this page, choose quality and codec settings, then click Convert. The result downloads as MKA instantly. All processing runs in your browser.
What codec is used for MKA?
The default codec for MKA is Matroska. You can change audio parameters in Advanced mode.
How do you store my files?
We do not store any processed audio. All conversion happens entirely in your browser using FFmpeg WASM.