I'm making a flashbang, and I have everything down, but I want to know if it's possible to make all ambient noise low so that it's more disorienting. The flashbang audio is in a Gui, so is there any way that I could decrease the volume of the ambient sound without decreasing the volume of the flashbang ring?
Option 1
If you temporarily increased that number and the ambient sounds have some distance between themselves and the player, it might give you the effect you want.
Option 2
In a LocalScript, detect/find all sounds (except the one(s) you wish to ignore) and scale their Volume properties accordingly.
Or combine them:
You might use Option 1 for the majority of sounds and Option 2 for humanoid-animation-related sounds (like walking/jumping), since those sounds probably will not be influenced by the RolloffScale (being very close to the player).
Also consider experimenting with different ReverbTypes (a property of the SoundService).