FLAC to AU — Format Comparison & Online Converter
Fast, instant FLAC to AU conversion. No signup required. Just drop your .flac file and get .au in seconds.
Batch Settings
Vous manipulez fréquemment des fichiers audio de haute fidélité et vous êtes confronté à la nécessité de les convertir au format AU ? Que ce soit pour des raisons de compatibilité logicielle, de spécifications matérielles ou d'intégration dans des systèmes audio plus anciens, passer du FLAC à l'AU peut s'avérer indispensable. Le format FLAC, reconnu pour sa compression sans perte, est idéal pour l'archivage et l'écoute audiophile. En revanche, le format AU, bien que moins courant aujourd'hui, conserve une pertinence notable dans certains environnements techniques et historiques, notamment dans le monde UNIX et les applications de traitement audio spécifiques. Notre outil est conçu pour vous offrir une transition fluide et efficace, garantissant la préservation de la qualité sonore de vos enregistrements tout en les rendant accessibles aux plateformes nécessitant ce format particulier. Découvrez comment simplifier vos flux de travail audio dès maintenant.
- Archivage sonore patrimonial
- Compatibilité avec des stations de travail audio Unix
- Intégration dans des logiciels de recherche acoustique
En France et en Belgique, l'AU est rarement utilisé par le grand public, mais il peut encore apparaître dans des contextes universitaires ou des laboratoires de recherche traitant d'anciens corpus sonores.
About FLAC to AU Conversion
FLAC (introduced 2001) and AU are both audio formats, but they differ in important ways. FLAC is lossless audio compression — bit-for-bit identical to the original at roughly 50-70% of WAV size. AU is a widely used file format.
When you convert FLAC to AU, the goal is to convert between formats quickly. Converting FLAC to AU maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your FLAC file is decoded and re-encoded as AU. The conversion involves 4 steps: (1) your flac file is uploaded and validated, (2) the file is decoded (parsed into its raw data), (3) the data is re-encoded in au format, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you When you need a AU file. For the opposite direction, CocoConvert also supports AU to FLAC conversion.
How to Convert FLAC to AU
- 1
Upload .flac file
Select your FLAC file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .au
Set AU as the output format. The converter uses optimal settings based on the FLAC→AU conversion profile.
- 3
Convert
The server-side engine decodes your FLAC file and re-encodes it as AU. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .au file. Multiple output files can be downloaded together.
What Happens When You Convert FLAC to AU
Your FLAC file is decoded and re-encoded as AU.
Your FLAC file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in AU format
The converted file is ready for download
Format Comparison
FLAC
.flac file
| Extension | .flac |
| MIME Type | audio/flac |
| Category | Audio |
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
Should You Convert FLAC to AU?
When to Convert
- ✓When you need a AU file
Frequently Asked Questions
What is the difference between FLAC and AU?
FLAC is lossless audio compression — bit-for-bit identical to the original at roughly 50-70% of WAV size. AU is a widely used file format.
Does FLAC to AU conversion affect quality?
Converting FLAC to AU maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, FLAC or AU?
FLAC uses lossless compression. AU is widely supported. The better choice depends on whether you prioritize file size or quality.
How long does FLAC to AU conversion take?
Most conversions finish in seconds. Larger files or complex audio content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is FLAC or AU better for long-term storage?
FLAC is better for archival since it's lossless.
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