gistfile1.cs

private void Image_PointerPressed(object sender, PointerRoutedEventArgs e)
{
	var img = e.OriginalSource as Windows.UI.Xaml.Controls.Image;

	if (img == null) return;

	var title = img.Tag as string;

	// The object for controlling the speech-synthesis engine (voice).
	var synth = new Windows.Media.SpeechSynthesis.SpeechSynthesizer();

	// Generate the audio stream from plain text.
	IAsyncOperation<SpeechSynthesisStream> stream = synth.SynthesizeTextToStreamAsync(title);

	stream.Completed = Speak;
}

private void Speak(IAsyncOperation<SpeechSynthesisStream> asyncInfo, AsyncStatus asyncStatus)
{
	var results = asyncInfo.GetResults();

	this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
	{
		MediaElement mediaElement = this.media;

		// Send the stream to the media object.
		mediaElement.SetSource(results, "");
		mediaElement.Play();
	});
}