We actually don't support exporting audio files, so...it's not something you can normally do from Trint.
 But...there is a way, it's just a tad complicated:

 1. export as an Interactive Transcript and download the ZIP file.
 2. Open the ZIP folder and find the HTML file that's inside it
 3. Drag and drop (or otherwise bring up) the HTML file in your browser. This will open up a very rudimentary version of a Trint.
 4. At the top of the page is an audio player, and you can click just to the right of this to download your audio file.

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