diff --git a/js/moleculesandlight/view/MoleculesAndLightScreenView.js b/js/moleculesandlight/view/MoleculesAndLightScreenView.js
index cc54fa8b..4e7e799c 100644
--- a/js/moleculesandlight/view/MoleculesAndLightScreenView.js
+++ b/js/moleculesandlight/view/MoleculesAndLightScreenView.js
@@ -288,7 +288,7 @@ define( require => {
 
     // molecule rotating sound
     const rotateSound = new SoundClip( rotationSoundInfo, {
-      initialOutputLevel: 0.05,
+      initialOutputLevel: 0.15,
       loop: true,
       enableControlProperties: [ photonAbsorptionModel.runningProperty ]
     } );
diff --git a/sounds/break-apart-v2.mp3 b/sounds/break-apart-v2.mp3
index ce498911..663097ef 100644
Binary files a/sounds/break-apart-v2.mp3 and b/sounds/break-apart-v2.mp3 differ