Can audio generated with Azure Text-to-Speech be publicly redistributed?

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@ynot22 I hope you are doing well.

Yes. If you are using the paid tier of Azure Text-to-Speech with prebuilt neural voices, Microsoft’s Product Terms explicitly allow customers to use the generated audio output, including for commercial purposes. This means you can generally redistribute the generated audio as a standalone research artifact.

A few points are important:

1. The service should be used under a paid Azure tier for the applicable output-use rights.
2. You must have the necessary rights to the text/content submitted to Azure TTS.
3. The consent requirements associated with voice talent primarily apply to custom neural voices rather than Microsoft's prebuilt neural voices.
4. Microsoft requires appropriate disclosure when AI-generated/synthetic content is used.
5. The generated output must not be used to create, train, or improve a competing or similar TTS service.

So, for your specific scenario — paid Azure TTS + prebuilt neural voice + your own research text + redistribution of the resulting audio — there is no separate Microsoft license or royalty requirement for the generated audio under the TTS output-use provision.

Microsoft references:

Microsoft Product Terms – Azure / Text-to-Speech Services

Text to speech FAQ – Foundry Tools

Text to speech transparency note

If the research artifact will be distributed under a specific open-source/research license (for example, CC BY or CC0), I would also check that the license you choose is consistent with the rights you actually have over the underlying text and any third-party material included in the dataset.

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