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GSM to AU - Online Audio Converter
Convert GSM to AU online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert GSM to AU
Drop GSM audio here or click to select
GSM
AU (PCM 16-bit)
About GSM to AU
Convert GSM to AU. GSM 06.10 encodes European mobile speech at 13 kbps. AU is Sun's simple container, usually holding 8 kHz telephony audio. Headers are minimal; verify sample rate after conversion..
Why convert GSM to AU?
- Larger files than lossy shares with AU uncompressed quality.
- Keep quality where supported.
- Private, no upload - runs in your browser.
GSM vs AU
| Codec | GSM | PCM 16-bit |
|---|---|---|
| Compression | lossy | uncompressed |
| Sample behavior | Quality set by bitrate | Full quality kept |
| Typical use | GSM 06.10 encodes European mobile speech at 13 kbps. | AU is Sun's simple container, usually holding 8 kHz telephony audio. |
When not to convert GSM to AU
- Skip AU for the smallest share: lossless output stays large, so prefer a lossy target when sending GSM files.
- Keep a master copy: repeated exports stack small losses, so archive GSM before batch AU shares.
Limits
Starting point: GSM - GSM 06.10 encodes European mobile speech at 13 kbps. Carrier framing can offset timing; verify duration. Headers are minimal; verify sample rate after conversion. Encode AU (PCM 16-bit) from GSM 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 GSM to AU?
Drop your GSM file onto this page, choose quality and codec settings, then click Convert. The result downloads as AU instantly. All processing runs in your browser.
What codec is used for AU?
The default codec for AU is PCM 16-bit. 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.