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AU to UMX - Online Audio Converter
Convert AU to UMX online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AU to UMX
Drop AU audio here or click to select
AU
UMX (UMX)
About AU to UMX
Convert AU to UMX. AU is Sun's simple container, usually holding 8 kHz telephony audio. UMX wraps tracker music for Unreal-engine game levels. Game containers may bundle several songs; convert each separately..
Why convert AU to UMX?
- Tiny files with UMX note events (no audio samples).
- Keep quality where supported.
- Private, no upload - runs in your browser.
AU vs UMX
| Codec | PCM 16-bit | UMX |
|---|---|---|
| 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. | UMX wraps tracker music for Unreal-engine game levels. |
When not to convert AU to UMX
- Skip UMX 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 UMX 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. Game containers may bundle several songs; convert each separately. Encode UMX (UMX) 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 UMX?
Drop your AU file onto this page, choose quality and codec settings, then click Convert. The result downloads as UMX instantly. All processing runs in your browser.
What codec is used for UMX?
The default codec for UMX is UMX. 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.