How to convert AU to M4A
- 1
Add your AU files
Drag and drop AU files onto the converter, paste them, or click to browse. You can add several at once.
- 2
Choose M4A
M4A is already selected. Open Options if you want to change quality, size or metadata.
- 3
Convert
Click Convert. Your files are converted right in your browser in seconds.
- 4
Download your M4A
Download each M4A file, or everything at once as a ZIP.
AU vs M4A
From
AU · Sun Audio
AU is a simple audio format introduced by Sun Microsystems, common on early Unix systems and Java.
- Type
- Audio
- Extension
- .au
- MIME
- audio/basic
- Best for
- legacy Unix and Java applications
Legacy format
All AU conversions →To
M4A · MPEG-4 Audio
M4A is an audio-only MP4 file, usually containing AAC (or lossless ALAC). It's Apple Music's and Voice Memos' default format.
- Type
- Audio
- Extension
- .m4a
- MIME
- audio/mp4
- Best for
- iTunes/Apple Music libraries and voice memos
Lossy compression
All M4A conversions →Need it the other way around? Convert M4A to AU.
Related conversions
- M4A to AU
- AU to MP3
- MP3 to M4A
- AU to WAV
- MP4 to M4A
- WAV to M4A
- AU to FLAC
- MOV to M4A
- AU to AAC
- WebM to M4A
- AU to OGG
- FLAC to M4A
Convert AU to other formats
AU to M4A: frequently asked questions
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