How to Convert AIFF to SOU — Quick & Free
Fast, instant AIFF to SOU conversion. No signup required. Just drop your .aiff file and get .sou in seconds.
Batch Settings
您是否曾遇到这样的情况：手头有一些高质量的AIFF音频文件，却在特定设备或软件上无法顺利播放，尤其是在处理一些老旧程序或游戏音频时？AIFF作为一种专业的无损格式，音质出众，但在跨平台兼容性方面有时会遇到挑战。而SOU格式，虽然不如MP3、WAV那样家喻户晓，但在一些特定的应用场景中，比如早期游戏开发、嵌入式系统或需要精简音频包体的场合，它却能发挥意想不到的作用。本工具旨在帮助您轻松将AIFF转换为SOU，确保您的音频资产能在更多环境下无缝使用，无论是为怀旧游戏准备音效，还是优化移动应用的音频加载速度，都能找到合适的解决方案。
- 怀旧游戏音效移植
- 微信小程序音频优化
- 老旧硬件系统适配
在中国大陆及周边地区，SOU格式虽然不常见于主流消费级应用，但在一些特定行业的早期项目或小众游戏开发中仍有其身影，尤其是在处理一些历史遗留的音频资源时，转换成SOU可以更好地兼容特定引擎或播放器。
About AIFF to SOU Conversion
Short answer: yes, you can convert AIFF to SOU online for free, and quality is well preserved with the right settings. Just upload your .aiff file to CocoConvert, pick SOU as the output, and click Convert. The whole process takes seconds.
Now for the details. AIFF is Apple's uncompressed audio format — equivalent to WAV in quality. SOU is a widely used file format. Converting between these two formats lets you convert between formats quickly.
Your AIFF file is decoded and re-encoded as SOU. Converting AIFF to SOU maintains high quality with CocoConvert's optimised encoder settings.
CocoConvert runs entirely online — no software to install, no account to create. Your files are encrypted during upload (TLS), processed on isolated servers in Germany, and permanently deleted after 24 hours. It works in Chrome, Safari, Firefox, Edge, and all mobile browsers.
Need to convert more than one file? Free users can do 5 per hour. Pro gets 100 per hour with files up to 5 GB each.
How to Convert AIFF to SOU
- 1
1. Upload AIFF
Drop your .aiff file onto the page (or tap "Browse" on mobile). Add multiple files for batch conversion.
- 2
2. Select SOU
Choose .sou from the output dropdown. Settings are pre-configured for best results.
- 3
3. Convert
One click. The server handles all the heavy lifting using FFmpeg and Sharp.
- 4
4. Download
Your .sou file is ready. Download it directly or get all files as a zip archive.
What Happens When You Convert AIFF to SOU
Your AIFF file is decoded and re-encoded as SOU.
Your AIFF file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in SOU format
The converted file is ready for download
Format Comparison
AIFF
.aiff file
| Extension | .aiff |
| MIME Type | audio/aiff |
| Category | Audio |
SOU
.sou file
| Extension | .sou |
| MIME Type | audio/x-sou |
| Category | Audio |
Should You Convert AIFF to SOU?
When to Convert
- ✓When you need a SOU file
Frequently Asked Questions
Is AIFF to SOU conversion free?
Yes. CocoConvert offers free AIFF to SOU conversion with generous daily limits — 25 minutes of processing time and up to 5 files per hour (250 MB each). Pro plans remove these limits.
How fast is AIFF to SOU conversion?
Most files convert in 2–10 seconds depending on size. Large audio files may take 30 seconds. Batch jobs process in parallel for maximum speed.
What happens to my files after conversion?
Your uploaded AIFF file and the converted SOU file are both automatically deleted from our servers within 24 hours. They are never shared, sold, or analysed.
Does converting AIFF to SOU lose quality?
Converting AIFF to SOU maintains high quality with CocoConvert's optimised encoder settings.
Can I convert SOU back to AIFF?
Yes, CocoConvert supports SOU to AIFF conversion as well. However, if the original conversion involved lossy compression, converting back won't recover the lost data.
Versions are pinned in our worker Dockerfile and re-built via CI on every change.