title: Add new voices for Windows Phone (WinRT) speech synthesizer
body: <p>Using the speech-to-text WinRT API:</p>
  
  <pre><code>private async Task SynthesizeSpeech(string text)
  {
      var synthesizer = new SpeechSynthesizer();
      var media = new MediaElement();
      var stream = await m_Synthesizer.SynthesizeTextToStreamAsync(text);
      m_Media.SetSource(stream, stream.ContentType);
      m_Media.Play();
  }
  </code></pre>
  
  <p>You can set the synthesizer's voice by choosing from the available ones on the device:</p>
  
  <pre><code>var voice = SpeechSynthesizer.AllVoices
      .FirstOrDefault(voice =&gt; voice.Language.StartsWith("es"));
  </code></pre>
  
  <p>My Windows Phone (8.1) includes a voices: an English, Japanese, and Chinese, male and female.</p>
  
  <p>My question is: is there any way to install new voices onto the device (or better yet, include them with my app)? </p>