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Audio Conversion

Convert M4A to AU Online — Free

Fast, free M4A to AU converter. No registration required.

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Hoe te converteren

1

Upload your .m4a file by dragging it into the upload area or clicking to browse.

2

Choose your output settings. The default settings work great for most files.

3

Click Convert and download your .au file when it's ready.

Wat is M4A?

M4A is an audio-only MPEG-4 container, commonly using AAC encoding. It provides better quality than MP3 at similar file sizes.

Formaatdetails

Volledige naam
MPEG-4 Audio
Extensie
.m4a

Belangrijkste kenmerken

  • Better than MP3
  • Apple ecosystem
  • AAC encoding
  • Metadata support

Wat is AU?

AU is an audio format created by Sun Microsystems. It's one of the oldest digital audio formats, commonly used on Unix and Java platforms.

Formaatdetails

Volledige naam
Sun Microsystems Audio
Extensie
.au

Belangrijkste kenmerken

  • Unix standard
  • Java audio
  • Simple format
  • Legacy support

M4A vs AU

KenmerkM4AAU
Volledige naamMPEG-4 AudioSun Microsystems Audio
Extensie.m4a.au
Beste voorBetter than MP3Unix standard

Veelgestelde vragen

Converting between lossless formats preserves perfect quality. When converting to lossy formats, our optimized encoding minimizes any audible difference. You can adjust bitrate to control quality vs. file size.
We preserve ID3 tags, album art, and metadata when both M4A and AU support them. Some metadata may not transfer between incompatible formats.
Pro users can batch convert multiple audio files simultaneously. Free users convert one file at a time with up to 5 free conversions per day.
We support all standard sample rates from 8kHz (voice) up to 192kHz (studio quality). The default preserves your source file's sample rate.
Yes. Our audio converter handles music, podcasts, voice memos, and audiobook files. For podcasts, we recommend MP3 at 128-192kbps for the best balance of quality and file size.

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