CELT to AU - Online Audio Converter

Convert CELT to AU online. Private, client-side - no uploadrequired. Batch conversion, quality presets, codec control.

Convert CELT to AU

[+] Drop CELT audio here or click to select CELT

Output format

AU (PCM 16-bit)

Mode[i]

Simple Advanced

Quality[i]

Sample Rate[i]

Channels[i]

About CELT to AU

Convert CELT to AU. CELT is the low-delay music layer later merged into Opus. AU is Sun's simple container, usually holding 8 kHz telephony audio. Headers are minimal; verify sample rate after conversion..

Why convert CELT to AU?

Larger files than lossy shares with AU uncompressed quality.
Keep quality where supported.
Private, no upload - runs in your browser.

CELT vs AU

Codec	CELT	PCM 16-bit
Compression	lossy	uncompressed
Sample behavior	Quality set by bitrate	Full quality kept
Typical use	CELT is the low-delay music layer later merged into Opus.	AU is Sun's simple container, usually holding 8 kHz telephony audio.

When not to convert CELT to AU

Skip AU for the smallest share: lossless output stays large, so prefer a lossy target when sending CELT files.
Keep a master copy: repeated exports stack small losses, so archive CELT before batch AU shares.

Limits

Starting point: CELT - CELT is the low-delay music layer later merged into Opus. Stand-alone files are rare; prefer Opus targets. Headers are minimal; verify sample rate after conversion. Encode AU (PCM 16-bit) from CELT 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 CELT to AU?

Drop your CELT 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.