Adjusting Audio Speed in Azure AI Speech

RN Dev 0

Is it possible to adjust the speed of audio generated using an OpenAI voice?

I know that OpenAI's REST API supports a parameter for speed, but I couldn't find anything similar in the Azure AI Speech documentation.

Thanks in advance!

Avinash Devarakonda 610 Reputation points Microsoft Vendor

2024-10-09T11:05:58.5533333+00:00

Hi RN Dev,

Thank you for reaching out to Microsoft Q&A forum!

In Azure AI Speech Service, under the Manage Files section, created a new text file and enable the SSML (Speech Synthesis Markup Language) and add a <prosody> tag to control the rate of speech, using the following format in SSML:

<prosody rate="x-fast">sample text</prosody>

After adjusting the rate attribute to various values (e.g., "x-fast", "medium", "slow"), the speed of the synthesized audio changed accordingly, demonstrating the effect of the SSML prosody tag in controlling speech rate.

Following is the attached screenshot for your reference:

I hope this helps. Thank you.
Avinash Devarakonda 610 Reputation points Microsoft Vendor

2024-10-10T11:58:40.3966667+00:00

Hi RN Dev,
I was trying to reach you to check if the given response was helpful.

Thank you!!
Avinash Devarakonda 610 Reputation points Microsoft Vendor

2024-10-14T06:49:34.7066667+00:00

Hi RN Dev,
Following up to see if the given response was helpful. Thank you
Greg Insardi 0 Reputation points

2025-02-26T22:28:27.2033333+00:00

Good Afternoon Avinash, came across this post while working with the Azure Speech to Text action in Power automate. Would you happen to know the min/max in percent I can use with the Azure AI Speech connectors? I want to add a slider to my Power App to allow the user to speed up/slow down the output, but I'm unclear if I need to set the variable as +50% or 150% to speed up 1.5x. I think going the opposite way I can just say -50% to get to half speed.

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Adjusting Audio Speed in Azure AI Speech

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