gistfile1.cs

        private async 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();

            var stream = await synth.SynthesizeTextToStreamAsync(title);

            MediaElement mediaElement = this.media;

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