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