Hi @ivo welch
Thank you for using the Microsoft Q&A forum.
I tried to repro your issue, by pasting the 2 paragraphs given in the question and trying to upload in the "Manage Files" option in "Audio Content Creation" screen of the Speech Studio UI. See below:
I then clicked on the "Name" of the uploaded file, as the "Content format" was showing a "X". See below :
When I click directly on the "play" button below, it gives error, as the "Voice Name" was not set yet. See below:
I then set the "Voice name" and "Language", as shown below:
Note that, I haven't still clicked on the "Save" button and hence the "Billable Characters" is shown as "N/A". The moment I click on the "Save", the "Billable Characters" appear. Please see below:
I then tried to "Export", and it was successful, as shown below:
I hope with the above provided steps, you should be able to successfully create and download the Audio.
Thank you for understanding.
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