How does sound normalisation work in Razer USB Soundcard?

Hi,

i have a question and razer support tries to answer me in german but this makes things even worse.
My problem:
i want to understand how sound normalisation works.
if i want the quiet sounds in the game like they are and reduce the volume of the loud sounds like explosions, etc.
Do i have to select 100% or 0%

(A) Means 100% that all Sounds are 100% volume. Means as they are = no sound normalization. Loud sounds are loud.

(B) Or does 100% mean that it's the max sound normalization and loud sounds are reduced?

For me it feels that with 0% all sounds are quieter. And with 100% all sound are louder.

Can someone please explain it to me.