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AMR to UMX - Online Audio Converter
Convert AMR to UMX online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AMR to UMX
Drop AMR audio here or click to select
AMR
UMX (UMX)
About AMR to UMX
Convert AMR to UMX. AMR encodes narrowband speech for GSM calls at 12.2 kbps and below. UMX wraps tracker music for Unreal-engine game levels. Game containers may bundle several songs; convert each separately..
Why convert AMR to UMX?
- Tiny files with UMX note events (no audio samples).
- Keep quality where supported.
- Private, no upload - runs in your browser.
AMR vs UMX
| Codec | AMR-NB | UMX |
|---|---|---|
| Compression | lossy | sequence |
| Sample behavior | Quality set by bitrate | Note events - no audio samples |
| Typical use | AMR encodes narrowband speech for GSM calls at 12.2 kbps and below. | UMX wraps tracker music for Unreal-engine game levels. |
When not to convert AMR to UMX
- Skip UMX for recorded sound: it stores note events, not audio, so keep the AMR recording.
- Keep a master copy: repeated exports stack small losses, so archive AMR before batch UMX shares.
Limits
Starting point: AMR - AMR encodes narrowband speech for GSM calls at 12.2 kbps and below. Tuned for voice calls, so music loses detail by design. Game containers may bundle several songs; convert each separately. Encode UMX (UMX) from AMR 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 AMR to UMX?
Drop your AMR 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.