This project is a sample to convert Speech (WAV file format) to text and text to speech using Microsoft Cognitive Services Speech SDK. To find out more about the Microsoft Cognitive Services Speech SDK itself, please visit the SDK documentation site at: https://docs.microsoft.com/en-us/azure/cognitive-services/speech-service/.

This sample was written as C# Console app for .NET Framework on Windows using Visual Studio 2017.

i. Before you can use Azure SpeechServices you need to add instance to your Azure account. It is categorized as Azure Congitive Services so from dashboard find Cognitive Services in portal.azure.com

ii. Add or Create cognitive services button to create a new SpeechService Cognitive Service instance. In the search bar type "Speech" and in the result list you will Speech item available

iii. select Speech item from the result list and populate the mandatory fields

iv. for demo or development, choose F0 tier which is free and comes with cetain limitations. Click Create button and your SpeechService instance is ready for usage

v. Click on the name of your SpeechService instance you created and got to Overview option

vi. You will need region value in the code in order to instantiate SpeechConfig class instance which you will use to instantiate SpeechRecognizer class which will communicate with your SpeechService instance. I choose East US region to keep my instance in, so the value in my code will be eastus

vii. The second value you need to configure SpeechRecognizer is SpeechService key. Select Keys section for selected SpeechService in Azure portal and you will get your instance keys in the right page of the portal page.

Note: the samples make use of the Microsoft Cognitive Services Speech SDK. By downloading the Microsoft Cognitive Services Speech SDK, you acknowledge its license, see Speech SDK license agreement.

var config = SpeechTranslationConfig.FromSubscription("YourSubscriptionKey", "YourServiceRegion");

Note: This application expects bitrate of 128kbps or higher for wav file. The application will not convert speech to text and will abort after executing "await recognizer.StartContinuousRecognitionAsync().ConfigureAwait(true);" and doesn't throw exception

a. Convert pyron wav file to m4a format and save to disk

b. Convert m4a format file created in step a to wav file with minimum 128kbps bitrate