StartContinuousRecognitionAsync Not Working on Windows 7 x86

Describe the bug While using StartContinuousRecognitionAsync on Windows 7, the connection to the Cognitive server suddenly dies during start.

Was able to trace the error using SDK 1.4+:

(893): 5203ms SPX_TRACE_ERROR: AZ_LOG_ERROR: WS open operation failed with result=8(WS_OPEN_ERROR_INVALID_BYTES_RECEIVED_ARGUMENTS), code=998[0x000003e6] (893): 5204ms SPX_TRACE_ERROR: Error: File:D:\a\1\s\source\core\usp\transport.cpp Func:?OnWSOpened@@YAXPAXU_WS_OPEN_RESULT_DETAILED@@@Z Line:422 (893): 5204ms SPX_TRACE_INFO: AZ_LOG_INFO: TS:1223, TransportError: connection:0x6304a8, reason=2, code=8 [0x00000008], string=998 (893): 5204ms SPX_DBG_TRACE_VERBOSE: Response: On Error: Code:5, Message: Connection failed (no connection to the remote host). Internal error: 8. Error details: 998. Please check network connection, firewall setting, and the region name used to create speech factory…

To Reproduce Steps to reproduce the behavior:

1. Start a new Console project targeting 4.6.2 Framework

2. Add a Nuget reference to Microsoft.CognitiveServices.Speech v1.3.1. (Newer releases throws a CreateFile2 entrypoint missing on Kernel32"

SpeechConfig speechConfig = SpeechConfig.FromSubscription(
                ConfigurationManager.AppSettings["Microsoft.SubscriptionKey"],
                ConfigurationManager.AppSettings["Microsoft.ServiceRegion"]);

speechConfig.SpeechRecognitionLanguage = "pt-BR";

SpeechRecognizer speechRecognizer = new SpeechRecognizer(speechConfig);

speechRecognizer.Recognized += (sender, recognitionResult) =>
{
                Console.WriteLine($"{recognitionResult.Result.Text}");
};

await speechRecognizer.StartContinuousRecognitionAsync().ConfigureAwait(false);

1. Target platform: x86

Expected behavior Sentences being recognized as it does while running on Windows 10

Version of the Cognitive Services Speech SDK 1.0.0~1.5.0

Platform, Operating System, and Programming Language

• OS: Windows 7 Enterprise x68 7601 SP1
• Hardware - Core i7-7700HQ
• Programming language: C#

Exactly same code works flawlessly on Windows 10 build 1903

[mahilleb-msft]

I’m sorry, @RodrigoRVieira – Windows 7 is not a supported platform for the Speech SDK. Please checkout https://docs.microsoft.com/azure/cognitive-services/speech-service/ for the platform support matrix.

Best, Mark

[chrisbasoglu]

we do have plans to open-source this component. in ~2-3 months.