Echo Sound Effect in a tunnel?

so i want to make stuff like tunnels, underground parking lots, etc.. and i have been trying a while to add a echo. Wich i can't seen to figure out. Atm i have this thing from the youtuber AlvinBlox with soundregions, first it tested it with music, wich worked, then i tried to add the EchoSoundEffect into the sound and remove the Music ID. Nothing happend.

folders (SoundRegions): https://imgur.com/yheGTZq

script for the regions:

local SoundRegionsWorkspace = game.Workspace:WaitForChild("SoundRegions")

local Found = false

while wait(1) do

    for i, v in pairs(SoundRegionsWorkspace:GetChildren()) do

        Found = false
        local region = Region3.new(v.Position - (v.Size/2),v.Position + (v.Size/2))

        local parts = game.Workspace:FindPartsInRegion3WithWhiteList(region, game.Players.LocalPlayer.Character:GetDescendants())


        for _, part in pairs(parts) do
            -- Loop one by one trough the parts table
            if part:FindFirstAncestor(game.Players.LocalPlayer.Name) then
                print("player was found")
                Found = true
                break
            else
                Found = false
                print("Player was not found in region")
            end
        end

        if Found == true then
        if script.Parent.SoundRegions[v.Name].IsPlaying == false then
            script.Parent.SoundRegions[v.Name]:Play()
            break
        end
        else
            script.Parent.SoundRegions[v.Name]:stop()
        end

    end
end