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AU to WMA Pro - Online Audio Converter
Convert AU to WMA Pro online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AU to WMA Pro
Drop AU audio here or click to select
AU
WMA Pro (WMA Pro)
About AU to WMA Pro
Convert AU to WMA Pro. AU is Sun's simple container, usually holding 8 kHz telephony audio. WMA Pro adds multichannel surround and higher resolutions to WMA. Surround mixes fold down to stereo on most converters..
Why convert AU to WMA Pro?
- Smaller files with WMA Pro lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
AU vs WMA Pro
| Codec | PCM 16-bit | WMA Pro |
|---|---|---|
| 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. | WMA Pro adds multichannel surround and higher resolutions to WMA. |
When not to convert AU to WMA Pro
- Skip WMA Pro 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 WMA Pro 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. Surround mixes fold down to stereo on most converters. Encode WMA Pro (WMA Pro) 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 WMA Pro?
Drop your AU file onto this page, choose quality and codec settings, then click Convert. The result downloads as WMA Pro instantly. All processing runs in your browser.
What codec is used for WMA Pro?
The default codec for WMA Pro is WMA Pro. 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.