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AU – audio

Webopedia Staff
Last Updated May 24, 2021 7:35 am

AU is short for audio, a common format for sound files on UNIX machines. The AU file format was first introduced by Sun Microsystems and is also the standard audio file format for the Java programming language. Au files generally end with a .au extension . On PCs, two other popular sound formats are WAV and MIDI.

Recommended Reading: Webopedia’s Data File Formats and File Extensions reference.