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AU to QCELP - Online Audio Converter
Convert AU to QCELP online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AU to QCELP
Drop AU audio here or click to select
AU
QCELP (QCELP)
About AU to QCELP
Convert AU to QCELP. AU is Sun's simple container, usually holding 8 kHz telephony audio. QCELP compresses CDMA voice near 8 kbps like EVRC. Carrier variants differ; check headers before converting..
Why convert AU to QCELP?
- Smaller files with QCELP lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
AU vs QCELP
| Codec | PCM 16-bit | QCELP |
|---|---|---|
| Compression | uncompressed | lossy |
| Sample behavior | Full quality kept | Quality set by bitrate |
| Typical use | AU is Sun's simple container, usually holding 8 kHz telephony audio. | QCELP compresses CDMA voice near 8 kbps like EVRC. |
When not to convert AU to QCELP
- Skip QCELP for archival masters: lossy compression discards detail, so keep the AU original.
- Keep a master copy: repeated exports stack small losses, so archive AU before batch QCELP shares.
Limits
Starting point: AU - AU is Sun's simple container, usually holding 8 kHz telephony audio. Headers are minimal; verify sample rate after conversion. Carrier variants differ; check headers before converting. Encode QCELP (QCELP) from AU 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 AU to QCELP?
Drop your AU file onto this page, choose quality and codec settings, then click Convert. The result downloads as QCELP instantly. All processing runs in your browser.
What codec is used for QCELP?
The default codec for QCELP is QCELP. 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.