Free online AU to MKA converter
Convert AU audio to MKA with FFmpeg or VLC for flexible playback and metadata support.
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How to convert au to mka file
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AU is an audio file format originally associated with Sun Microsystems and often used for simple, uncompressed or lightly compressed sound data. MKA is a Matroska audio container that can store one or more audio tracks, along with metadata and subtitles in some cases. Converting AU to MKA usually means wrapping or re-encoding the audio into the Matroska container for better compatibility, organization, or metadata support.
Why convert au to mka
People convert AU to MKA when they want a more flexible container for audio archiving, playback, or distribution. MKA can hold modern codecs and richer metadata than the older AU format.
- Better compatibility with media players that support Matroska
- Improved metadata support for tags and track information
- Flexible audio storage for single or multiple tracks
- Useful for archiving audio in a modern container
Best software for au to mka conversion
The best overall choice is FFmpeg, because it is fast, free, and supports both formats well. It can usually convert AU audio into an MKA container with a simple command. For users who prefer a graphical interface, VLC media player and Audacity can also help, though FFmpeg is the most reliable for direct conversion.
Recommended converter: FFmpeg
Why FFmpeg: it supports many audio codecs, preserves quality when possible, and works on Windows, macOS, and Linux.
How to convert au to mka with ffmpeg
Use a command like this:
ffmpeg -i input.au -c:a copy output.mka
If the AU file uses a codec that cannot be copied directly into Matroska, re-encode the audio:
ffmpeg -i input.au -c:a aac output.mka
Tip: Use -c:a copy only when the audio codec inside the AU file is compatible with the MKA container. If not, choose a widely supported codec such as AAC or FLAC.
How to convert au to mka with vlc
VLC can convert audio through its media conversion tools:
- Open Media → Convert / Save
- Add the AU file
- Choose Convert
- Select an audio profile and set the output filename with .mka
- Start the conversion
Note: VLC is convenient, but it offers less control than FFmpeg.
How to convert au to mka with audacity
Audacity is useful if you want to edit the audio before exporting. Import the AU file, make any changes, then export using a supported audio format and place it in an MKA-compatible workflow if needed. For direct container conversion, FFmpeg is still the better option.
Things to check before conversion
- Audio codec inside the AU file
- Sample rate and channel count
- Whether you need lossless output
- Player support for the final MKA file
Summary
AU to MKA conversion is best handled with FFmpeg for speed, quality, and compatibility. If you need a simple interface, VLC is a practical alternative. Choose MKA when you want a modern Matroska audio container with flexible playback and metadata support.
Note: This au to mka conversion record is incomplete, must be verified, and may contain inaccuracies. Please vote below whether you found this information helpful or not.
AU vs MKA: format comparison
How the AU and MKA formats compare on the properties that matter most for this conversion.
| Property | .AU Sun/NeXT audio file | .MKA Matroska Audio |
|---|---|---|
| Compression | Uncompressed | Both |
| Metadata support | Basic | Extensive |
| Streaming | Yes | Partial |
| DRM protection | No DRM | Optional |
| Opens in a web browser | Partial | No |
| Typical file size | Large | Medium |
| Open standard | Yes | Yes |
| Best used for | Speech and voice | Music |
| Introduced | 1988 | 2003 |
| Developer | Sun Microsystems / NeXT | Matroska.org |
| MIME type | audio/basic | audio/x-matroska |
Frequently asked questions
Is the AU to MKA converter free?
Yes, converting AU to MKA on 101convert.com is completely free. No registration, email address or installation is required.
How large can my AU file be?
You can upload AU files up to 1000 MB and convert up to 100 files at once in a single batch.
What happens to my uploaded files?
Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.
Do I need to install any software to convert AU to MKA?
No. The AU to MKA conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.
Did the conversion fail?
In most cases, the cause is an incorrect file format. Please upload a valid AU file for this AU to MKA conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.