diff --git a/controllers/prototype/views/prototype.jade b/controllers/prototype/views/prototype.jade
index a48b69e..f86f284 100644
--- a/controllers/prototype/views/prototype.jade
+++ b/controllers/prototype/views/prototype.jade
@@ -113,6 +113,7 @@ block content
         label(for="showarrows" style={'margin-right':'10px'}) Show arrows
 
         audio#music(controls, volume=0.5)
+            source(src="/static/data/music/bobomb.ogg")
             source(src="/static/data/music/bobomb.mp3")
 
         #container(style={'padding': '0px', 'margin': '0px'}, tabindex="1")
diff --git a/static/data/music/bobomb.ogg b/static/data/music/bobomb.ogg
new file mode 100644
index 0000000..b280d90
Binary files /dev/null and b/static/data/music/bobomb.ogg differ
diff --git a/static/data/music/starappears.ogg b/static/data/music/starappears.ogg
new file mode 100644
index 0000000..8ae0af3
Binary files /dev/null and b/static/data/music/starappears.ogg differ
diff --git a/static/js/prototype/Coin.js b/static/js/prototype/Coin.js
index 9c39988..6b17d5f 100644
--- a/static/js/prototype/Coin.js
+++ b/static/js/prototype/Coin.js
@@ -68,7 +68,7 @@ Coin.prototype.get = function() {
     }
 }
 
-Coin.lastSound = new Audio('/static/data/music/starappears.mp3');
+Coin.lastSound = new Audio('/static/data/music/starappears' + Coin.extension);
 Coin.lastSound.preload = "auto";
 
 Coin.total = 1;