gistfile1.txt

static List<AVAudioPlayer> players = new List<AVAudioPlayer>();
		static async Task<bool> PlayAudioFile(string path)
		{
			var tcs = new TaskCompletionSource<bool> ();
			var player = AVAudioPlayer.FromUrl (NSUrl.FromFilename (path));
			players.Add (player);
			player.FinishedPlaying += (object sender, AVStatusEventArgs e) => {
				Console.WriteLine ("done");
				tcs.TrySetResult(true);
			};
			Console.WriteLine ("play");
			player.Play ();
			var result = await tcs.Task;

			Console.WriteLine ("dispose");
			players.Remove (player);
			player.Dispose();
			return result;


		}
		public static Task Speak (string text) {
			var speechSynthesizer = new AVSpeechSynthesizer ();
			var tcs = new TaskCompletionSource<bool> ();
			var speechUtterance = new AVSpeechUtterance (text) {
				Rate = AVSpeechUtterance.MaximumSpeechRate/4,
				//Voice = AVSpeechSynthesisVoice.FromLanguage ("en-AU"),
				//Volume = 0.5f,
				//PitchMultiplier = 1.5f
			};
			EventHandler<AVSpeechSynthesizerUteranceEventArgs> del = null;
			del = (object sender, AVSpeechSynthesizerUteranceEventArgs e) => {
				if(e.Utterance == speechUtterance){
					tcs.TrySetResult(true);
					speechSynthesizer.DidFinishSpeechUtterance -= del;
				}
			};
			speechSynthesizer.DidFinishSpeechUtterance += del;

			speechSynthesizer.SpeakUtterance (speechUtterance);
			return tcs.Task;
		}