AU vs SPX — Comparison & Free Converter
Fast, instant AU to SPEEX conversion. No signup required. Just drop your .au file and get .spx in seconds.
Batch Settings
Pernahkah Anda menyimpan rekaman suara penting, mungkin hasil kuliah daring, memo cepat, atau bahkan melodi yang baru terlintas, dalam format AU? Format ini, meski dulunya umum, kini mungkin terasa kurang fleksibel untuk dibagikan atau diputar di berbagai perangkat yang Anda gunakan sehari-hari, apalagi jika ingin menghemat ruang penyimpanan. Di era serba cepat ini, kemudahan akses dan efisiensi adalah kunci. Kami memahami betul kebutuhan Anda untuk mengubah file audio AU tersebut menjadi SPX, sebuah format yang dikenal ringkas dan tetap menjaga kualitas suara, sangat cocok untuk kebutuhan berbagi via aplikasi pesan atau mengunggah konten tanpa memakan banyak kuota. Mari kita permudah alur kerja audio Anda.
- Berbagi materi edukasi via WhatsApp
- Kompresi rekaman wawancara lapangan
- Optimasi audio untuk podcast lokal
Di Indonesia, format SPX sering dipilih untuk efisiensi data saat berbagi audio melalui platform pesan instan, terutama di daerah dengan koneksi internet yang bervariasi.
About AU to SPEEX Conversion
AU or SPX — 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. SPX is a widely used file format. It has common platform support.
So when should you convert AU to SPX? This conversion is ideal when you When you need a SPX file. This conversion helps you convert between formats quickly.
Converting AU to SPX maintains high quality with CocoConvert's optimised encoder settings.
If you've decided SPX is the right choice, CocoConvert makes the conversion effortless. Upload your .au file, pick SPX, 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 SPEEX
- 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 SPX
Select .spx 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 SPX file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert AU to SPEEX
Your AU file is decoded and re-encoded as SPX.
Your AU file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in SPX format
The converted file is ready for download
Format Comparison
AU
.au file
| Extension | .au |
| MIME Type | audio/basic |
| Category | Audio |
Speex
.spx file
| Extension | .spx |
| MIME Type | audio/ogg |
| Category | Audio |
Should You Convert AU to SPEEX?
When to Convert
- ✓When you need a SPX file
Frequently Asked Questions
Should I use AU or SPX?
It depends on your goal. AU preserves full quality. SPX preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is SPX higher quality than AU?
Not necessarily. Converting AU to SPX 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 SPX 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 SPX?
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 SPX?
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.