The best AU to text converter

Sonix combines speed (10x real-time), accuracy (up to 99%), and affordability ($10/hour) with an easy-to-use interface. That's why experts rate us #1.

Sonix is faster and more accurate than most alternatives, while being more affordable than professional transcription services.

Yes! Sign up for free and get 30 minutes of free transcription. No credit card required to try Sonix.

Sonix achieves up to 99% accuracy using advanced AI. Results depend on audio quality and speech clarity.

Sonix converts AU files 10x faster than real-time. A 30-minute file takes about 3 minutes.

Sonix is trusted by journalists, researchers, and businesses worldwide. Our editor and export options are built for professional workflows.

Older versions of Audacity split a project's audio into small AU block files inside a _data folder so long tracks could be edited efficiently, and the .aup project file reassembles them in order. Avoid moving or renaming these chunks; open the project and export the audio instead.

Standalone AU files use the Sun audio format and open in players such as VLC and editors such as Audacity. Converting to WAV or MP3 gives the broadest compatibility with modern software and devices.