add short music loop to demo stage

GitOrigin-RevId: 7ea3d773b1

Shared/SneakGame.cs

@@ -1,4 +1,5 @@
 using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Audio;
 using Microsoft.Xna.Framework.Graphics;
 using Microsoft.Xna.Framework.Input;
 using MonoGame.Framework.Utilities;
@@ -67,6 +68,10 @@ namespace SemiColinGames {
       SoundEffects.Load(Content);
       Textures.Load(Content);
       linesOfSight = new LinesOfSight(GraphicsDevice);
+      SoundEffectInstance music = SoundEffects.IntroMusic.CreateInstance();
+      music.IsLooped = true;
+      music.Volume = 0.1f;
+      music.Play();
       LoadLevel();
     }
 

Shared/SoundEffects.cs

@@ -4,9 +4,11 @@ using Microsoft.Xna.Framework.Content;
 namespace SemiColinGames {
   public static class SoundEffects {
 
+    public static SoundEffect IntroMusic;
     public static SoundEffect[] SwordSwings = new SoundEffect[4];
 
     public static void Load(ContentManager content) {
+      IntroMusic = content.Load<SoundEffect>("music/playonloop/smash_bros_short");
       SwordSwings[0] = content.Load<SoundEffect>("sfx/zapsplat/sword_whoosh_1");
       SwordSwings[1] = content.Load<SoundEffect>("sfx/zapsplat/sword_whoosh_2");
       SwordSwings[2] = content.Load<SoundEffect>("sfx/zapsplat/sword_whoosh_3");