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AU to MTM - Online Audio Converter
Convert AU to MTM online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AU to MTM
Drop AU audio here or click to select
AU
MTM (MTM)
About AU to MTM
Convert AU to MTM. AU is Sun's simple container, usually holding 8 kHz telephony audio. MTM (MultiTracker) sequences 32-channel DOS-era compositions. Old 32-channel layouts may fold down; check the mix..
Why convert AU to MTM?
- Tiny files with MTM note events (no audio samples).
- Keep quality where supported.
- Private, no upload - runs in your browser.
AU vs MTM
| Codec | PCM 16-bit | MTM |
|---|---|---|
| Compression | uncompressed | sequence |
| Sample behavior | Full quality kept | Note events - no audio samples |
| Typical use | AU is Sun's simple container, usually holding 8 kHz telephony audio. | MTM (MultiTracker) sequences 32-channel DOS-era compositions. |
When not to convert AU to MTM
- Skip MTM for recorded sound: it stores note events, not audio, so keep the AU recording.
- Keep a master copy: repeated exports stack small losses, so archive AU before batch MTM 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. Old 32-channel layouts may fold down; check the mix. Encode MTM (MTM) 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 MTM?
Drop your AU file onto this page, choose quality and codec settings, then click Convert. The result downloads as MTM instantly. All processing runs in your browser.
What codec is used for MTM?
The default codec for MTM is MTM. 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.