In this post they explain that the Volume value is a multiplier
So setting it to 0 would result in no sound and 2 would be 2x louder. But for me 0 just makes it a litle quieter, and Ive been trying different values and I cant find the range to use for my audio settings slider.
Never mind It turned out I hadnt considered that All of the Groups need to be added to the VCAs.
I hadnt placed SoundFX_Deaf under any VCA but I did place the SoundFX group in the VCA. And since the SoundFX was the parent, I didnt think that the child needed to be added as well.