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AMR to MTM - Online Audio Converter
Convert AMR to MTM online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AMR to MTM
Drop AMR audio here or click to select
AMR
MTM (MTM)
About AMR to MTM
Convert AMR to MTM. AMR encodes narrowband speech for GSM calls at 12.2 kbps and below. MTM (MultiTracker) sequences 32-channel DOS-era compositions. Old 32-channel layouts may fold down; check the mix..
Why convert AMR to MTM?
- Tiny files with MTM note events (no audio samples).
- Keep quality where supported.
- Private, no upload - runs in your browser.
AMR vs MTM
| Codec | AMR-NB | MTM |
|---|---|---|
| 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. | MTM (MultiTracker) sequences 32-channel DOS-era compositions. |
When not to convert AMR to MTM
- Skip MTM 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 MTM 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. Old 32-channel layouts may fold down; check the mix. Encode MTM (MTM) 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 MTM?
Drop your AMR file onto this page, choose quality and codec settings, then click Convert. The result downloads as MTM instantly. All processing runs in your browser.
What codec is used for MTM?
The default codec for MTM is MTM. 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.