All Tools
[ audio bench ]
AU to PCM - Online Audio Converter
Convert AU to PCM online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.
Convert AU to PCM
Drop AU audio here or click to select
AU
PCM (PCM 16-bit)
About AU to PCM
Convert AU to PCM. AU is Sun's simple container, usually holding 8 kHz telephony audio. PCM is raw pulse-code samples with no container or headers. Sample rate and width must be set by hand since headers carry none..
Why convert AU to PCM?
- Larger files than lossy shares with PCM uncompressed quality.
- Keep quality where supported.
- Private, no upload - runs in your browser.
AU vs PCM
| Codec | PCM 16-bit | PCM 16-bit |
|---|---|---|
| Compression | uncompressed | uncompressed |
| Sample behavior | Full quality kept | Full quality kept |
| Typical use | AU is Sun's simple container, usually holding 8 kHz telephony audio. | PCM is raw pulse-code samples with no container or headers. |
When not to convert AU to PCM
- Skip PCM for the smallest share: lossless output stays large, so prefer a lossy target when sending AU files.
- Keep a master copy: repeated exports stack small losses, so archive AU before batch PCM 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. Sample rate and width must be set by hand since headers carry none. Encode PCM (PCM 16-bit) 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.
Related conversions
FAQ
How do I convert AU to PCM?
Drop your AU file onto this page, choose quality and codec settings, then click Convert. The result downloads as PCM instantly. All processing runs in your browser.
What codec is used for PCM?
The default codec for PCM 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.