Wma-proprietary

From Audacity Manual

Audacity cannot play or export files in RealAudio, Shorten (SHN) or most other proprietary formats, due to licensing and patent restrictions. WMA files can be played and exported if the optional ffmpeg library is installed.

On a Mac computer, unprotected AAC formats such as M4A can be imported natively. On other operating systems this requires the ffmpeg library to be installed.

Some open formats are not yet supported, including Ogg Speex and Musepack.

Files protected by any kind of Digital Rights Management (DRM), including most purchased online such as from iTunes or Napster, cannot be imported.

If you can't import your file into Audacity, then if it is not DRM-protected, use iTunes or SUPER to convert it to WAV or AIFF. If it is protected, burn it to an audio CD in the program licensed to play it, then extract the CD track to WAV or AIFF using iTunes or (on Windows) CDex or Windows Media Player 11. You could also record the CD to your computer.

To export to an unsupported format, export to WAV or AIFF and convert it to the desired format in iTunes or SUPER.

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