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AU to EC-3 - Online Audio Converter
Convert AU to EC-3 online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AU to EC-3
Drop AU audio here or click to select
AU
EC-3 (E-AC-3)
About AU to EC-3
Convert AU to EC-3. AU is Sun's simple container, usually holding 8 kHz telephony audio. EC-3 is the broadcast-table name for E-AC-3 streams. Same payload as E-AC3 under the short program-table name..
Why convert AU to EC-3?
- Smaller files with EC-3 lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
AU vs EC-3
| Codec | PCM 16-bit | E-AC-3 |
|---|---|---|
| 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. | EC-3 is the broadcast-table name for E-AC-3 streams. |
When not to convert AU to EC-3
- Skip EC-3 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 EC-3 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. Same payload as E-AC3 under the short program-table name. Encode EC-3 (E-AC-3) 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 EC-3?
Drop your AU file onto this page, choose quality and codec settings, then click Convert. The result downloads as EC-3 instantly. All processing runs in your browser.
What codec is used for EC-3?
The default codec for EC-3 is E-AC-3. 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.