UMX to HE-AAC - Online Audio Converter
Convert UMX to HE-AAC online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About UMX to HE-AAC
Convert UMX to HE-AAC. UMX wraps tracker music for Unreal-engine game levels. HE-AAC adds spectral band replication for efficient low-bitrate streaming. Needs an HE-AAC decoder; plain AAC players may play only half the bandwidth..
Why convert UMX to HE-AAC?
- Smaller files with HE-AAC lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
UMX vs HE-AAC
| Codec | UMX | AAC (HE) |
|---|---|---|
| Compression | sequence | lossy |
| Sample behavior | Note events - no audio samples | Quality set by bitrate |
| Typical use | UMX wraps tracker music for Unreal-engine game levels. | HE-AAC adds spectral band replication for efficient low-bitrate streaming. |
When not to convert UMX to HE-AAC
- Skip HE-AAC for archival masters: lossy compression discards detail, so keep the UMX original.
- Keep a master copy: repeated exports stack small losses, so archive UMX before batch HE-AAC shares.
Limits
Starting point: UMX - UMX wraps tracker music for Unreal-engine game levels. Game containers may bundle several songs; convert each separately. Needs an HE-AAC decoder; plain AAC players may play only half the bandwidth. Encode HE-AAC (AAC (HE)) from UMX 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.