MonoGame.Samples/Tests/MacOS/SoundTest2/SoundTest2_MacOs/Game1.cs

using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;

namespace SoundTest
{
	public class Game1 : Microsoft.Xna.Framework.Game
	{
		GraphicsDeviceManager graphics;
		SpriteBatch spriteBatch;
		Texture2D tExplosion;
		SoundEffect sExplosion;
		SoundEffectInstance eExplosion;
		float move = 11f;
		Random rnd = new Random ();
		
		class explosion
		{
			public Vector2 Position;
			public float Size;
			
			public explosion (Vector2 pos)
			{
				Position = pos;
				Size = 1f;
			}
		}
		
		List<explosion> Explosions = new List<explosion> ();
		TimeSpan timer = TimeSpan.Zero;
		int Interval = 1000; //Milliseconds. The duration of the sound is about 1.5 sec.

		public Game1 ()
		{
			graphics = new GraphicsDeviceManager (this);
			Content.RootDirectory = "Content";
			graphics.PreferredBackBufferWidth = 1024;
			;
			graphics.PreferredBackBufferHeight = 768;
			graphics.IsFullScreen = false;
			Explosions.Add (new explosion (new Vector2 (1025, 384)));
		}

		protected override void Initialize ()
		{

			base.Initialize ();

		}

		/// <summary>
		/// LoadContent will be called once per game and is the place to load
		/// all of your content.
		/// </summary>
		protected override void LoadContent ()
		{
			spriteBatch = new SpriteBatch (GraphicsDevice);

			sExplosion = Content.Load<SoundEffect> ("ExplosionSound");
			tExplosion = Content.Load<Texture2D> ("Explosion");
			eExplosion = sExplosion.CreateInstance ();
		}

		protected override void Update (GameTime gameTime)
		{
			base.Update (gameTime);
			/*
			//update explosions
			for (int i = 0; i<Explosions.Count;i++)
			{
				Explosions[i].Size -= 0.01f;
				if (Explosions[i].Size < 0.1f)
				{
					Explosions.RemoveAt(i);
					i--;
				}
			}
			
			//Check for next explosion
			timer += gameTime.ElapsedGameTime;
			if (timer.TotalMilliseconds > Interval)
			{
				timer = TimeSpan.Zero;
				float x = rnd.Next(24,1000);
				Explosions.Add(new explosion(new Vector2(x, rnd.Next(50,700))));
				sExplosion.Play(1f, 1f, (x / 512f) -1);
			}
			*/
			
			float pan = 0;
			if (Explosions [0].Position.X > 1024 || Explosions [0].Position.X < 0) {
				move = -move;
				pan = MathHelper.Clamp ((Explosions [0].Position.X / 512f) - 1, -1, 1);
				eExplosion.Pan = pan;

				eExplosion.Play ();				
			}
			Explosions [0].Position.X += move;
			pan = MathHelper.Clamp ((Explosions [0].Position.X / 512f) - 1, -1, 1);
			eExplosion.Pan = pan;
			//Console.WriteLine (pan);

			//Check for exit
			KeyboardState state = new KeyboardState ();
			state = Keyboard.GetState ();
			if (state.IsKeyDown (Keys.Escape) || state.IsKeyDown (Keys.Space) || state.IsKeyDown (Keys.Enter))
				this.Exit ();

		}

		protected override void Draw (GameTime gameTime)
		{
			GraphicsDevice.Clear (Color.Black);
			base.Draw (gameTime);
			spriteBatch.Begin ();
			//Draw explosions
			foreach (explosion e in Explosions)
				spriteBatch.Draw (tExplosion, e.Position, null, Color.White, 0, Vector2.Zero, e.Size, SpriteEffects.None, 1);
			spriteBatch.End ();
		}
	}
}