What I mean, is, sounds that are made like songs and sword slashes echo through the whole game, like in 'Stop it, Slender!'
Open your game in edit mode using roblox studio. In the explore tab, look for "SoundScape". Find the option "AmbientReverb" and scroll through the options. This will solve your problem
I'm simply happy to answer you question. If you want to add some echo music please go to this link as it will show you! https://blog.roblox.com/2016/11/bring-your-sounds-to-life-with-new-audio-effects-and-properties/