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M4A to UMX - Online Audio Converter
Convert M4A to UMX online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert M4A to UMX
Drop M4A audio here or click to select
M4A
UMX (UMX)
About M4A to UMX
Convert M4A to UMX. M4A is the MPEG-4 audio container usually holding AAC or ALAC. UMX wraps tracker music for Unreal-engine game levels. Game containers may bundle several songs; convert each separately..
Why convert M4A to UMX?
- Tiny files with UMX note events (no audio samples).
- Keep quality where supported.
- Private, no upload - runs in your browser.
M4A vs UMX
| Codec | AAC | UMX |
|---|---|---|
| Compression | lossy | sequence |
| Sample behavior | Quality set by bitrate | Note events - no audio samples |
| Typical use | M4A is the MPEG-4 audio container usually holding AAC or ALAC. | UMX wraps tracker music for Unreal-engine game levels. |
When not to convert M4A to UMX
- Skip UMX for recorded sound: it stores note events, not audio, so keep the M4A recording.
- Keep a master copy: repeated exports stack small losses, so archive M4A before batch UMX shares.
Limits
Starting point: M4A - M4A is the MPEG-4 audio container usually holding AAC or ALAC. Check whether the track is AAC or ALAC before picking settings. Game containers may bundle several songs; convert each separately. Encode UMX (UMX) from M4A 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.
Related conversions
FAQ
How do I convert M4A to UMX?
Drop your M4A 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.