It's all normal value, so the problem isn't this.
Probably I don't have well understand what is this 'pause'

.
So you start your game, start a new play, launch the shape and when you have the first hit with one shape on the upper side you hear the soundfx a lot after than, for example, the second or the third hit. Is this correct?
One stupid question, are you trying to load a SoundFX on your game loop or you have all your sound preloaded before your game start?