diff -r f8f222243d3c -r ceebcfdcc742 minesweeper/src/main/java/org/apidesign/demo/minesweeper/MinesModel.java
--- a/minesweeper/src/main/java/org/apidesign/demo/minesweeper/MinesModel.java	Sun Mar 16 08:30:22 2014 +0100
+++ b/minesweeper/src/main/java/org/apidesign/demo/minesweeper/MinesModel.java	Sun Mar 16 09:24:51 2014 +0100
@@ -231,7 +231,7 @@
         }
     }
     
-    private static final AudioClip TOUCH = AudioClip.create("move.mp3");
+    private static AudioClip TOUCH;
     @Function static void click(Mines model, Square data) {
         if (model.getState() != GameState.IN_PROGRESS) {
             return;
@@ -243,6 +243,9 @@
                     showAllBombs(model, SquareType.EXPLOSION);
                     model.setState(GameState.LOST);
                 } else {
+                    if (TOUCH == null) {
+                        TOUCH = AudioClip.create("move.mp3");
+                    }
                     TOUCH.play();
                     expandKnown(model, data);
                     model.computeMines();