Au speech to text

Download and install the latest version of Filestar.
Right click on one or more Au file(s) on your desktop and select Convert with Filestar.
Type speech to text in the search box.
Press Run.

What is .au?

Name: Audacity Audio File
Extension: .au
Format: Binary
Category: Audio
Developer: Audacity
Description: Audio file created by Audacity, a free, cross platform audio editor; uses a proprietary format that can only be opened by Audacity; saved as one of multiple audio data files for an Audacity project (.AUD).
MIME Type: audio/basic
Sample: sample.au
Wikipedia: .au on Wikipedia

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Last updated October 3, 2026