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AU FILE FORMAT

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WHAT IS AU?

Description
What is AU? AU is short for “audio”, which means that this file type was created to store sound. It is not a very common format; it is primarily used on Unix systems, which are not widely themselves. Still, playback of AU files on Windows or Mac is also possible; several programs are able to open these audio files. Below, you’ll find information on how to play AUs.
Developed by
Sun Microsystems
File Extension
.au
Technical Details
The AU format specification has three main parts: a header, an annotation, and the main block that contains audio data. This data can be encoded by μ-law, PCM, or A-law algorithms. Aside from the programs listed below, you can also use Java apps to play AU files.
Associated Programs
Windows Media Player, QuickTime, VLC, others