MMegaConvert

Convert AU to WMA

Free online AU to WMA converter. No signup required.

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Max file size: 100 MB

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How to Convert AU to WMA

Follow these simple steps to convert your file in seconds.

  1. 1

    Upload your .au file

    Drag and drop your .au file into the upload area, or click "Browse" to select it from your device. Your file is uploaded securely and processed on our servers.

  2. 2

    Click "Convert to WMA"

    Once your file is uploaded, press the convert button to start the AU to WMA conversion process.

  3. 3

    Wait for the conversion to complete

    The conversion usually takes just a few seconds. You can see the progress in real time while your file is being processed.

  4. 4

    Download your converted .wma file

    When the conversion is finished, click the download button to save your new .wma file. The file is ready to use immediately.

Understanding AU and WMA Formats

Learn about the source and target file formats to understand what happens during conversion.

Source Format

Sun AU Audio

audio/basic

AU is an audio file format introduced by Sun Microsystems and commonly associated with Unix and NeXT systems. It supports various encodings including uncompressed PCM, mu-law, and A-law compression, with a simple header structure. AU was one of the earliest audio formats supported on the web and remains used in Unix-based audio programming.

Advantages

  • Simple, well-documented format with a minimal header
  • Native support in Unix, Solaris, and Java audio APIs
  • Supports multiple encoding types including mu-law for telephony

Limitations

  • Largely obsolete for general-purpose audio use
  • Limited metadata support and no modern compression options
  • Poor support in consumer audio software and devices

Common Uses

  • Unix and Solaris system audio and sound effects
  • Java application audio playback (javax.sound)
  • Legacy telephony and voice processing systems

Target Format

WMA Audio

audio/x-ms-wma

WMA (Windows Media Audio) is a proprietary audio compression format developed by Microsoft as part of the Windows Media framework. It supports lossy, lossless, and voice-optimized encoding profiles. WMA was designed to compete with MP3 and offers comparable quality at lower bitrates, though its usage has declined significantly in favor of more universal formats.

Advantages

  • Good compression efficiency, especially at lower bitrates
  • Includes DRM support for protected content distribution
  • Native integration with Windows Media Player and Windows ecosystem

Limitations

  • Proprietary Microsoft format with limited cross-platform support
  • Not supported natively on macOS, iOS, or many Linux systems
  • Declining usage and relevance compared to MP3, AAC, and Opus

Common Uses

  • Legacy Windows Media Player libraries and playlists
  • DRM-protected audio content from older music stores
  • Windows-centric audio workflows and applications

Frequently Asked Questions

Common questions about converting AU to WMA.

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