--- a/src/sound.cpp	Wed Jun 13 11:17:30 2007 +0000
+++ b/src/sound.cpp	Wed Jun 13 11:45:14 2007 +0000
@@ -152,7 +152,8 @@
 }
 
 
-static const byte _vol_factor_by_zoom[] = {255, 190, 134};
+static const byte _vol_factor_by_zoom[] = {255, 190, 134, 87, 49};
+assert_compile(lengthof(_vol_factor_by_zoom) == ZOOM_LVL_END);
 
 static const byte _sound_base_vol[] = {
 	128,  90, 128, 128, 128, 128, 128, 128,