XA vs AU — Comparison & Free Converter
Fast, instant XA to AU conversion. No signup required. Just drop your .xa file and get .au in seconds.
Batch Settings
大切な音声ファイル、XA形式からAU形式への変換でお困りではありませんか？特に、繊細な音質が求められるアニメやゲームのサウンド制作、あるいはビジネスにおける重要な音声記録など、様々な場面で最適なファイル形式の選択は、その後の活用範囲を大きく左右します。当社の変換ツールは、そうした日本のクリエイティブな現場やビジネスシーン特有のニーズに応えるべく、音質の劣化を最小限に抑えつつ、迅速かつ正確な変換を実現します。煩雑な設定は不要で、直感的な操作でどなたでも簡単にご利用いただけます。ファイル形式の壁を越え、お手持ちの音声データをさらに幅広い環境でご活用ください。
- アニメ・ゲーム音声のプラットフォーム対応
- ビジネス会議録音の汎用化
- 伝統芸能のデジタルアーカイブ
日本では、特定のオーディオ機器や古いシステムでAU形式が依然として利用されることがあり、XAからの変換は互換性確保に役立ちます。特に、縦書きテキストと同期させる音声コンテンツでは、安定した再生環境が求められます。
About XA to AU Conversion
XA or AU — which format should you use? The answer depends on your needs. Here's a quick breakdown.
XA is a widely used file format. It has common platform support. AU is a widely used file format. It has common platform support.
So when should you convert XA to AU? This conversion is ideal when you When you need a AU file. This conversion helps you convert between formats quickly.
Converting XA 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 .xa 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 XA to AU
- 1
Choose your XA file
Upload your .xa file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to AU
Select .au from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large audio files.
- 4
Get your AU file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert XA to AU
Your XA file is decoded and re-encoded as AU.
Your XA 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
XA
.xa file
| Extension | .xa |
| MIME Type | audio/x-xa |
| Category | Audio |
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
Should You Convert XA to AU?
When to Convert
- ✓When you need a AU file
Frequently Asked Questions
Should I use XA or AU?
It depends on your goal. XA 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 XA?
Not necessarily. Converting XA 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 XA 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 XA 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 XA 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.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.