This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Hi Microsofties,
A conflict in voice status.
These voices are listed as "public preview" in web documentation
en-US-AlloyTurboMultilingualNeural
en-US-EchoTurboMultilingualNeural
en-US-FableTurboMultilingualNeural
en-US-OnyxTurboMultilingualNeural
en-US-ShimmerMultilingualNeuralH
https://learn.microsoft.com/en-us/azure/ai-services/speech-service/language-support?tabs=tts
"1 The neural voice is available in public preview. Voices and styles in public preview are only available in these service regions: East US, Southeast Asia, and West Europe."
In the API these voices return GA - General availability
For example en-US-AlloyTurboMultilingualNeural Status: 'GA'
{
Name: 'Microsoft Server Speech Text to Speech Voice (en-US, AlloyTurboMultilingualNeural)',
DisplayName: 'Alloy Turbo Multilingual',
LocalName: 'Alloy Turbo Multilingual',
ShortName: 'en-US-AlloyTurboMultilingualNeural',
Gender: 'Male',
Locale: 'en-US',
LocaleName: 'English (United States)',
SecondaryLocaleList: […],
SampleRateHertz: '48000',
VoiceType: 'Neural',
Status: 'GA',
VoiceTag: { TailoredScenarios: [Array], VoicePersonalities: [Array] }
}
I'd like to understand the reason for the difference.
Please advise. Thank you team!
An Azure service that integrates speech processing into apps and services.
This discrepancy could be due to documentation lag, where the official documentation has not yet been updated to reflect the latest status changes in the API.
Thank you for your answer. You may note the TTS release notes are sometimes not updated on a regular schedule. It is not unusual to see a two month break in those. For example:
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(153.6, 52%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJS%3C/text%3E%3C/svg%3E)
Hi @STStreamZ ,
The API might reflect the most recent updates, indicating a voice has transitioned to GA,
and SriLakshmi C mentioned the documentation awaits revision to mirror these changes.
Do let me know if there is any query or issue you facing, meanwhile I will check with the internal team and get back to you once I have an updated.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(176, 16%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESC%3C/text%3E%3C/svg%3E)
Hello @STStreamZ,
Greetings and Welcome to Microsoft Q&A! Thanks for posting the question.
The TurboMultilingualNeural voices, such as en-US-AlloyTurboMultilingualNeural, are listed as being in public preview according to the documentation, while the API reports them as GA (General Availability).
This discrepancy could be due to documentation lag, where the official documentation has not yet been updated to reflect the latest status changes in the API. However, you can keep an eye on the Azure AI Service release notes for updates on what's new in Azure Speech Services page will be updated accordingly with more details.
When a voice is in public preview, it typically means it is still undergoing testing and may not yet be fully production-ready, even though it is available for use. On the other hand, the GA status in the API could indicate that the voice has reached a stable phase for production deployment. The difference might also be due to regional availability, where some Azure regions still consider the voices in preview while others have moved them to GA.
I Hope this helps. Do let me know if you have any further queries.
If this answers your query, do click Accept Answer and Yes for was this answer helpful.
Thank you!