WS_OPEN_ERROR_UNDERLYING_IO_ERROR error when testing text to speech sample code

Question

WS_OPEN_ERROR_UNDERLYING_IO_ERROR error when testing text to speech sample code

Tristan Bailey 30

I am trying to get text to speech sample code working in Visual Studio 2022, as can be seen on the following webpage:

[https://learn.microsoft.com/en-us/azure/cognitive-services/speech-service/get-started-text-to-speech?tabs=windows%2Cterminal&pivots=programming-language-csharp

I have the necessary SDKs installed (both C++ and Microsoft Cognitive Services Speech). I have created an Azure account and speech service resource, and have applied the key I was supplied and relevant region to environment variables. However, I have not been able to get the code to work. After running the code, I type in a phrase to be spoken, and the following error message appears:

CANCELED: Reason=Error
CANCELED: ErrorCode=ConnectionFailure
CANCELED: ErrorDetails=[(Connection failed (no connection to the remote host). Internal error: 11. Error details: Failed with error: WS_OPEN_ERROR_UNDERLYING_IO_ERROR

screenshot

I have seen similar errors reported by other people, but not this exact one.

I verified the key and region, using the PowerShell code supplied on another page. I have also tried using other regions, at the request of a Microsoft employee via chat, but that did not work either. What am I missing?

romungi-MSFT 49,096 Reputation points Microsoft Employee Moderator

2023-01-23T06:42:42.2933333+00:00

Tristan Bailey The error code in this case points to a connection error to the endpoint from your machine while the SDK tries to send the request to the resource for synthesis. Since you have mentioned that you have tried resources from another regions, I would assume that none of the resources have any networking limitations set on the resource side i.e any restrictions on accessing the resource from public internet. This means that there might be some networking or firewall restrictions from your source network that is failing the request.

Have you tried to run the same setup on a different machine or connecting to a different network to check if the request is successful?

Also, was the setup successful when the following was run to add the package to the solution?

dotnet add package Microsoft.CognitiveServices.Speech

I have tried to run the same solution on my machine with a resource in australia east and west europe and it runs successfully.

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romungi-MSFT 49,096 Reputation points Microsoft Employee Moderator

2023-01-23T06:42:42.2933333+00:00

Tristan Bailey The error code in this case points to a connection error to the endpoint from your machine while the SDK tries to send the request to the resource for synthesis. Since you have mentioned that you have tried resources from another regions, I would assume that none of the resources have any networking limitations set on the resource side i.e any restrictions on accessing the resource from public internet. This means that there might be some networking or firewall restrictions from your source network that is failing the request.

Have you tried to run the same setup on a different machine or connecting to a different network to check if the request is successful?

Also, was the setup successful when the following was run to add the package to the solution?

dotnet add package Microsoft.CognitiveServices.Speech

I have tried to run the same solution on my machine with a resource in australia east and west europe and it runs successfully.

Answer 1

Tristan Bailey 30

Hi romungi,

Thanks for your response. The issue is now resolved. I am not quite sure what the cause of the problem actually was, but after I upgraded the operating system from Windows 10 to Windows 11, and applied the latest updates, the problem seems to have fixed itself. I cannot say yet whether this will work once compiled and run on another computer, though, as I haven't quite got that far.

Also, before I could get a voice to work, I needed to try the entire list of voices under the 'australiaeast' region. In fact, I could only get two of the region's voices to work (Natasha and William). All other voices caused Error code 1107: unsupported voice.

romungi-MSFT 49,096 Reputation points Microsoft Employee Moderator

2023-01-27T05:40:54.9333333+00:00

The unsupported error code could probably be because the voice is not available in your region. You will have to check the list of supported voices using the voice list API for different locales and use the ones that are available.

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WS_OPEN_ERROR_UNDERLYING_IO_ERROR error when testing text to speech sample code

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