AU vs VMS — Comparison & Free Converter
Fast, instant AU to VMS conversion. No signup required. Just drop your .au file and get .vms in seconds.
Batch Settings
音声ファイル形式「AU」から、業務用文書作成に定評のある「VMS」への変換は、単なるデータ形式の移行以上の意味を持ちます。特に、繊細な表現が求められる日本のコンテンツ制作や、視認性を重視するビジネス文書においては、その変換品質が最終的な印象を大きく左右することも少なくありません。本ツールは、長年培われた技術に基づき、音源の持つニュアンスを損なうことなく、VMS形式の持つ優れたテキスト・レイアウト表現力へと橋渡しをします。例えば、縦書きの美しい組版や、多種多様なフォントの埋め込みなど、VMSが強みとする機能を最大限に活かすことで、変換後のファイルが、まるで最初からその形式で制作されたかのような自然な仕上がりをお約束します。煩雑な設定は不要、直感的な操作で、高品質な変換を実現します。
- 漫画・アニメの音声スクリプト作成
- ビジネス会議録の文字起こしと編集
- 伝統芸能の口伝記録と保存
VMS形式は、特に日本語の縦書き文書における文字詰めや行間調整の自由度が高く、また埋め込みフォントの互換性も広いため、AUからの変換後も、元の音声が持つ情感やニュアンスを視覚情報として忠実に再現しやすい特性があります。
About AU to VMS Conversion
AU or VMS — which format should you use? The answer depends on your needs. Here's a quick breakdown.
AU is a widely used file format. It has common platform support. VMS is a widely used file format. It has common platform support.
So when should you convert AU to VMS? This conversion is ideal when you When you need a VMS file. This conversion helps you convert between formats quickly.
Converting AU to VMS maintains high quality with CocoConvert's optimised encoder settings.
If you've decided VMS is the right choice, CocoConvert makes the conversion effortless. Upload your .au file, pick VMS, 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 AU to VMS
- 1
Choose your AU file
Upload your .au file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to VMS
Select .vms 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 VMS file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert AU to VMS
Your AU file is decoded and re-encoded as VMS.
Your AU file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in VMS format
The converted file is ready for download
Format Comparison
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
VMS
.vms file
| Extension | .vms |
| MIME Type | audio/x-vms |
| Category | Audio |
Should You Convert AU to VMS?
When to Convert
- ✓When you need a VMS file
Frequently Asked Questions
Should I use AU or VMS?
It depends on your goal. AU preserves full quality. VMS preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is VMS higher quality than AU?
Not necessarily. Converting AU to VMS 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 AU to VMS 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 AU to VMS?
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 AU to VMS?
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.