AU to WMA Voice - Online Audio Converter
Convert AU to WMA Voice online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
About AU to WMA Voice
Convert AU to WMA Voice. AU is Sun's simple container, usually holding 8 kHz telephony audio. WMA Voice targets speech down to 4 kbps for voice recorders. Voices stay clear while music thins out; choose music codecs for songs..
Why convert AU to WMA Voice?
- Smaller files with WMA Voice lossy compression.
- Keep quality where supported.
- Private, no upload - runs in your browser.
AU vs WMA Voice
| Codec | PCM 16-bit | WMA Voice |
|---|---|---|
| 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 Voice targets speech down to 4 kbps for voice recorders. |
When not to convert AU to WMA Voice
- Skip WMA Voice 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 Voice 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. Voices stay clear while music thins out; choose music codecs for songs. Encode WMA Voice (WMA Voice) 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.