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Windows Phone 8.1 Access to speech synthesizer denied?

I am trying to create an application that tells users when they click a button.

The speech synthesizer code looks like this

 Windows.Media.SpeechSynthesis.SpeechSynthesizer x = new Windows.Media.SpeechSynthesis.SpeechSynthesizer();
      var stream = await x.SynthesizeTextToStreamAsync(someString);
      var mediaElement = new MediaElement();
      mediaElement.SetSource(stream, stream.ContentType);
      mediaElement.Play();

While this code worked in another application, it doesn't work with this project. I keep getting the following error.

  +     e   {System.UnauthorizedAccessException: Access is denied. Access is denied. at Windows.Media.SpeechSynthesis.SpeechSynthesizer..ctor()  at TalkingWalkingMaps.ManeuverDisplayer.<DisplayManeuver>d__0.MoveNext()}    System.Exception {System.UnauthorizedAccessException}

I read online that I had to delete the value of HKEY_CURRENT_USER \ Software \ Microsoft \ Speech \ CurrentUserLexicon from my registry using regedit, but that didn't work.

Can anyone please help?

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It turns out the problem is with the app manifest file. Although at first glance it is not intuitive to understand how the microphone works, for the Speech Synthesizer. enter image description here



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