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AIFF vs AU — Comparison & Free Converter

Fast, instant AIFF to AU conversion. No signup required. Just drop your .aiff file and get .au in seconds.

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Dans l'univers foisonnant des formats audio numériques, la conversion de l'AIFF vers l'AU répond à des besoins spécifiques, notamment pour les professionnels et les institutions francophones. L'AIFF, format de haute fidélité souvent privilégié dans l'édition musicale et la post-production en environnement Apple, se distingue par sa qualité non compressée. Cependant, lorsqu'il s'agit d'intégrer ces fichiers dans des systèmes plus anciens, des applications spécifiques ou des environnements Unix/Linux, le format AU (Audio mu-law), bien que plus compact et parfois de moindre fidélité, s'avère indispensable. Notre outil de conversion en ligne est conçu pour faciliter cette transition, garantissant une préservation optimale de l'intégrité sonore tout en adaptant vos fichiers aux exigences techniques de diverses plateformes. Que vous soyez un archiviste, un ingénieur du son ou un développeur, nous vous offrons une solution simple et efficace pour convertir vos fichiers AIFF en AU.

  • Archivage de données sonores pour l'administration publique
  • Compatibilité avec des plateformes éducatives universitaires
  • Échanges inter-logiciels dans le design sonore

Historiquement, certains systèmes informatiques universitaires et administratifs en France et au Québec ont longtemps privilégié des formats comme l'AU pour leur compatibilité universelle avec les systèmes Unix. La conversion AIFF vers AU reste donc pertinente pour l'accès à des archives ou l'intégration dans des infrastructures existantes.

About AIFF to AU Conversion

AIFF or AU — which format should you use? The answer depends on your needs. Here's a quick breakdown.

AIFF is Apple's uncompressed audio format — equivalent to WAV in quality. It has mostly universal platform support. AU is a widely used file format. It has common platform support.

So when should you convert AIFF to AU? This conversion is ideal when you When you need a AU file. This conversion helps you convert between formats quickly.

Converting AIFF to AU maintains high quality with CocoConvert's optimised encoder settings.

If you've decided AU is the right choice, CocoConvert makes the conversion effortless. Upload your .aiff file, pick AU, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.

Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.

How to Convert AIFF to AU

  1. 1

    Choose your AIFF file

    Upload your .aiff file using drag-and-drop or the file browser. Batch mode lets you add multiple files.

  2. 2

    Set format to AU

    Select .au from the output options. The converter applies optimal quality settings automatically.

  3. 3

    Run the conversion

    Click Convert. Server-side processing means your device stays fast — even for large audio files.

  4. 4

    Get your AU file

    Download your converted file instantly. Batch downloads are available as a zip archive.

What Happens When You Convert AIFF to AU

Your AIFF file is decoded and re-encoded as AU.

1

Your AIFF 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

Format Comparison

.aiff

AIFF

.aiff file

Extension.aiff
MIME Typeaudio/aiff
CategoryAudio
.au

AU

.au file

Extension.au
MIME Typeaudio/basic
CategoryAudio

Should You Convert AIFF to AU?

When to Convert

  • When you need a AU file

Frequently Asked Questions

Should I use AIFF or AU?

It depends on your goal. AIFF preserves full quality. AU preserves full quality. Choose based on whether file size or quality matters more for your use case.

Is AU higher quality than AIFF?

Not necessarily. Converting AIFF to AU maintains high quality with CocoConvert's optimised encoder settings. Quality depends on the compression type and settings, not just the format name.

Can I convert AIFF to AU on Mac and Windows?

Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.

Is CocoConvert free for AIFF to AU?

Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.

What tools does CocoConvert use for AIFF to AU?

CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.

Powered by — installed on our conversion workers
FFmpeg 8.1 (static)

Versions are pinned in our worker Dockerfile and re-built via CI on every change.