TTS Error of Timeout while synthesizing a small text

Question

TTS Error of Timeout while synthesizing a small text

David 0

I was doing TTS using Azure speech API. Each text file is not large, generally 500 words converting within around 2 minute voice. I got 10~15 text files in total. During the conversion, I got 3~4 errors which are in the same type of Speech synthesis canceled: CancellationReason.Error. Error details: Timeout while synthesizing. Current RTF: 2.00423 (threshold 2), frame interval 3471ms (threshold 3000ms). USP state: ReceivingData. Received audio size: 15552 bytes. It seems the timeout is due to the RTF and frame interval threasholds. I did search the solution, but it seems there's no option to adjust these 2 threasholds. Everything in my code was very basic just using the the Azure demo code. Can anyone provide the explantion why it was happening and how to sovle it?

David 0 Reputation points

2024-02-21T13:12:58.1866667+00:00

Thanks Vasavi for your reply! I am currently in Tier F0 but I don't think it related to the pricing tier. I did not use concurrent mode and TTS conversion was done in serial mode, meaning the code was converting each text file one after another. As you suggested to increase the quota with a.table, may I ask what the transaction mean in this context? As F0 has the limit of 20 transactions in 60 seconds, I probably can adjust the transaction to circumvent the problem, well hopfully. Thanks again.
VasaviLankipalle-MSFT 18,676 Reputation points Moderator

2024-02-22T01:04:58.1+00:00

Hello @David , a transaction in Azure Speech refers to a single call to the service, whether it's an SDK call, a REST call, or any other type of call that creates a connection to the service.

In the case of converting a text fragment to speech, a single request to the API to create speech for that fragment would count as one transaction.

If you till face issues, please raise an issue here: https://github.com/Azure-Samples/cognitive-services-speech-sdk/issues
David 0 Reputation points

2024-02-22T03:30:52.7633333+00:00

Thanks Vasavi for the information. If Transaction is a request to the API, then I have no way to circumvent the issue :) Unless this is an intentional hurdle that MS sets to the Free users (F0), I believe this is a bug. Okay I will raise it to github.
VasaviLankipalle-MSFT 18,676 Reputation points Moderator

2024-02-22T16:16:42.9333333+00:00

Hello @David , we received your feedback that the answer provided on the thread was not helpful.

If you wish, you may re-surveying/rating for the engagement you received on the thread. Your feedback is very important to us.

Looking forward to your reply. Much appreciate your feedback!

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David 0 Reputation points

2024-02-21T13:12:58.1866667+00:00

Thanks Vasavi for your reply! I am currently in Tier F0 but I don't think it related to the pricing tier. I did not use concurrent mode and TTS conversion was done in serial mode, meaning the code was converting each text file one after another. As you suggested to increase the quota with a.table, may I ask what the transaction mean in this context? As F0 has the limit of 20 transactions in 60 seconds, I probably can adjust the transaction to circumvent the problem, well hopfully. Thanks again.
VasaviLankipalle-MSFT 18,676 Reputation points Moderator

2024-02-22T01:04:58.1+00:00

Hello @David , a transaction in Azure Speech refers to a single call to the service, whether it's an SDK call, a REST call, or any other type of call that creates a connection to the service.

In the case of converting a text fragment to speech, a single request to the API to create speech for that fragment would count as one transaction.

If you till face issues, please raise an issue here: https://github.com/Azure-Samples/cognitive-services-speech-sdk/issues
David 0 Reputation points

2024-02-22T03:30:52.7633333+00:00

Thanks Vasavi for the information. If Transaction is a request to the API, then I have no way to circumvent the issue :) Unless this is an intentional hurdle that MS sets to the Free users (F0), I believe this is a bug. Okay I will raise it to github.
VasaviLankipalle-MSFT 18,676 Reputation points Moderator

2024-02-22T16:16:42.9333333+00:00

Hello @David , we received your feedback that the answer provided on the thread was not helpful.

If you wish, you may re-surveying/rating for the engagement you received on the thread. Your feedback is very important to us.

Looking forward to your reply. Much appreciate your feedback!

Answer 1

Hello @David , Thanks for using Microsoft Q&A Platform.

May I know the pricing tier of the speech resource you are working on?

For the standard pricing tier, you can try increase concurrent request limit.

Otherwise try to follow the best practices to mitigate throttling. If thresholds are exceeded, the speech synthesis service may cancel the synthesis process and return an error. Control the service responses and implement the logic that falls back (reduces the load) if you get too many requests (response code 429).

For example, retry the load increase in one minute, and if it still doesn't work, try again in two minutes. Use a pattern of 1-2-4-4 minutes for the intervals. Break up your text files into smaller chunks. Increase the amount of time allowed for speech synthesis.

The Text to speech quotas and limits per resource are listed here:

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I hope this helps.

Regards,

Vasavi

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TTS Error of Timeout while synthesizing a small text

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