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HomeMID vs AU
.mid
.au

MID vs AU

Compare MIDI Audio and Sun Audio formats — understand the key differences and when to use each

Format Overview

MID

MIDI Audio

MIDI Audio (.mid) is a audio file format.

.midaudio

AU

Sun Audio

Sun Audio (.au) is a audio file format.

.auaudio

MID vs AU: Feature Comparison

FeatureMIDAU
Full NameMIDI AudioSun Audio
File Extension.mid.au
Categoryaudioaudio
Free to Convert✓ Yes✓ Yes
Browser Support✓ All Browsers✓ All Browsers
Convert to Each Other✓ Yes✓ Yes

When to Use MID vs AU

Use MID when you need:

  • •Files in MIDI Audio format for maximum compatibility
  • •Industry-standard audio format support
  • •Wide software and platform compatibility

Use AU when you need:

  • •Files in Sun Audio format for specific workflows
  • •Optimized audio format features
  • •Modern format advantages and smaller file sizes

Convert Between Them

MID AUAU MID
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Learn More About These Formats

MID Converter AU Converter

Frequently Asked Questions

What is the difference between MID and AU?
MID (MIDI Audio) and AU (Sun Audio) are both audio file formats. MID files use the .mid extension while AU uses .au. They differ in compression, quality, compatibility, and intended use cases.
Can I convert MID to AU for free?
Yes! Convert999 lets you convert MID to AU completely free, directly in your browser. No file upload to any server, no registration needed — your files stay private on your device.
Which is better, MID or AU?
It depends on your use case. MID (MIDI Audio) may be better for certain workflows, while AU (Sun Audio) excels in others. Consider factors like file size, quality, software compatibility, and your specific needs.
Is it safe to convert files on Convert999?
Absolutely. Convert999 processes all files 100% locally in your browser. Your files are never uploaded to any server, ensuring complete privacy and security.

MID Converter

Convert from MID

AU Converter

Convert from AU

File Tools

Compress, resize, merge

Convert to MID

All sources → MID

Convert to AU

All sources → AU

Format Statistics

Trends & data 2025

More Format Comparisons

JPGvsPNGPNGvsWEBPJPGvsWEBPSVGvsPNGHEICvsJPGBMPvsJPGTIFFvsJPGGIFvsPNG