AU Won't Open? Convert to SMP Instantly
Fast, instant AU to SMP conversion. No signup required. Just drop your .au file and get .smp in seconds.
Batch Settings
大切な音声ファイル、AU形式からSMP形式への変換でお困りではありませんか？高品質な音声は、ビジネスシーンでのプレゼンテーションから、感動的なアニメーションのサウンドトラック、耳に残るゲームのBGMまで、あらゆるコンテンツの質を左右します。特に日本においては、繊細な音のニュアンスが重視される場面が多く、ファイル形式の選択一つでその表現力が大きく変わることも少なくありません。当社の変換ツールは、そうした細やかなニーズに応えるべく開発されました。複雑な設定は不要。直感的な操作で、お手持ちのAUファイルをSMP形式へとスムーズに変換し、あなたのクリエイティブな活動やビジネスを強力にサポートします。音質の劣化を最小限に抑え、元のファイルの持つ魅力を最大限に引き出すことに注力しておりますので、どうぞご安心ください。さあ、今すぐ変換を始めましょう。
- アニメ・ゲーム制作の音声データ連携
- ビジネス会議録のアーカイブ
- 伝統芸能の音源デジタル化
日本のコンテンツ産業では、音声ファイルの互換性がプロジェクトのスムーズな進行に不可欠です。SMP形式への変換は、特に専門的なオーディオ編集ソフトウェアでの作業効率向上に寄与することがあります。
About AU to SMP Conversion
Dealing with a AU file that won't open on your device? You're not alone — AU compatibility issues are one of the most common reasons people search for a file converter. AU is a widely used file format.
The fix is simple: convert your AU to SMP. SMP is a widely used file format. This conversion lets you convert between formats quickly, solving the problem in seconds rather than hours of troubleshooting.
Converting AU to SMP maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert processes your AU file on secure servers in Germany — upload, convert, download. Your files are encrypted via TLS and automatically deleted within 24 hours. No account needed, no software to install, and it works on any device with a browser.
This conversion is ideal when you When you need a SMP file.
The conversion engine behind CocoConvert uses FFmpeg, Sharp, and qpdf — the same open-source libraries trusted by Netflix, YouTube, and enterprise platforms. Pro users can batch convert up to 100 files at once.
How to Convert AU to SMP
- 1
Add your AU file
Drag and drop your .au file into the converter, or tap "Browse" to pick it from your device. Multiple files are supported for batch processing.
- 2
Pick SMP output
Select .smp as the target format. CocoConvert automatically applies the best quality settings for this conversion.
- 3
Start conversion
Hit the Convert button. The audio engine processes your file server-side — no CPU drain on your device.
- 4
Save your file
Once done, download your .smp file. For batch jobs, download all at once as a zip.
What Happens When You Convert AU to SMP
Your AU file is decoded and re-encoded as SMP.
Your AU file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in SMP format
The converted file is ready for download
Format Comparison
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
SMP
.smp file
| Extension | .smp |
| MIME Type | audio/x-smp |
| Category | Audio |
Should You Convert AU to SMP?
When to Convert
- ✓When you need a SMP file
Frequently Asked Questions
Why won't my AU file open?
AU files may not open if your device lacks the right codec or application. Converting to SMP — a more widely supported format — usually resolves this. SMP is a widely used file format.
Is it safe to convert AU to SMP online?
Yes. CocoConvert encrypts your file via TLS, processes it on isolated servers in Germany, and permanently deletes it within 24 hours. Your files are never shared or analysed.
Will I lose quality converting AU to SMP?
Converting AU to SMP maintains high quality with CocoConvert's optimised encoder settings. CocoConvert uses high-quality encoder defaults to preserve as much fidelity as possible.
How large can my AU file be?
Free users can convert files up to 250 MB each. Pro users get a 5 GB limit per file, and Business API users have custom limits.
Can I convert AU to SMP on my phone?
Absolutely. CocoConvert works in any modern browser — iOS Safari, Android Chrome, and all desktop browsers. No app required.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.