XM to HE-AAC - Online Audio Converter
Convert XM to HE-AAC online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About XM to HE-AAC
Convert XM to HE-AAC. XM (FastTracker 2) sequences 32 instruments with envelopes. 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 XM to HE-AAC?
- Smaller files with HE-AAC lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
XM vs HE-AAC
| Codec | XM | AAC (HE) |
|---|---|---|
| Compression | sequence | lossy |
| Sample behavior | Note events - no audio samples | Quality set by bitrate |
| Typical use | XM (FastTracker 2) sequences 32 instruments with envelopes. | HE-AAC adds spectral band replication for efficient low-bitrate streaming. |
When not to convert XM to HE-AAC
- Skip HE-AAC for archival masters: lossy compression discards detail, so keep the XM original.
- Keep a master copy: repeated exports stack small losses, so archive XM before batch HE-AAC shares.
Limits
Starting point: XM - XM (FastTracker 2) sequences 32 instruments with envelopes. Volume-column effects vary by engine; audition the render. Needs an HE-AAC decoder; plain AAC players may play only half the bandwidth. Encode HE-AAC (AAC (HE)) from XM 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.