diff -up BlockOutII-2.3/BlockOut_GL/SoundManager.cpp~ BlockOutII-2.3/BlockOut_GL/SoundManager.cpp

--- BlockOutII-2.3/BlockOut_GL/SoundManager.cpp~	2007-11-25 23:13:00.000000000 +0100

+++ BlockOutII-2.3/BlockOut_GL/SoundManager.cpp	2007-11-25 23:13:00.000000000 +0100

@@ -142,7 +142,7 @@ void SoundManager::PlayHit() {

 void SoundManager::PlayMusic() {

   if( creditsMusic==NULL ) {

-    creditsMusic = Mix_LoadMUS( LID("sounds/music.mp3") );

+    creditsMusic = Mix_LoadMUS( LID("sounds/music.ogg") );

     if( !creditsMusic ) {

       printf("Music cannot be played: %s\n",SDL_GetError());

       return;