Strange Module Behaviour

[nvishurl]

In short, I’m making my own sound module based on 3DAudioSystem module for my future projects and better sound manipulating. But the module somehow works very strange

WARNING!! LOUD SOUNDS Here’s the video:

And here’s the code:

--// Services
local replicatedStorage = game:GetService("ReplicatedStorage")
local runService = game:GetService("RunService")

--// Folders
local modules = replicatedStorage:WaitForChild("Modules")

--// Assets
local camera : Camera = workspace.CurrentCamera

--// Modules
local settings = require(script.settings)
local trove = require(modules.Libraries.trove)
local dicitionaryExpansion = require(modules.Libraries.dicitionaryExpansion)

--// Sound Container
local soundContainer = Instance.new("Part")
soundContainer.Name = "SoundContainer"
soundContainer.CFrame = CFrame.new()
soundContainer.Anchored = true
soundContainer.CanCollide = false
soundContainer.CanQuery = false
soundContainer.CanTouch = false
soundContainer.Massless = true
soundContainer.Transparency = 1
soundContainer.Parent = camera

local oldSound_Container = Instance.new("Folder")
oldSound_Container.Name = "OldSound_Container"
oldSound_Container.Parent = replicatedStorage

--// Start Module
local system = {}
local currentSounds = {}

--// Module Functions
-- sanityCheck
system.sanityCheck = function(sound : Sound)
	if not sound.Archivable then return nil end
	
	return true
end

-- registerSound
system.registerSound = function(sound : Sound)
	-- Prepare Custom Sound
	local self = {}	
	local parent = sound.Parent
	local emitter = Instance.new("Attachment")
	emitter.Name = "emitter"
	emitter.Parent = soundContainer
	
	local soundObject = sound:Clone()
	soundObject.Name = "Sound"
	soundObject.Parent = emitter
	
	local Equalizer = Instance.new("EqualizerSoundEffect")
	Equalizer.Name = "EarSimulation"
	Equalizer.LowGain = 0
	Equalizer.MidGain = 0
	Equalizer.HighGain = 0
	Equalizer.Parent = soundObject
	
	local soundTrove = trove.new()
	soundTrove:Add(emitter)
	soundTrove:Add(sound)
	
	local parentType = typeof(parent)
	if parent == "Vector3" then
		emitter.WorldPosition = parent
	elseif parentType == "CFrame" then
		emitter.WorldCFrame = parent
	else	
		emitter.WorldCFrame = parent.CFrame
		soundTrove:Connect(runService.Heartbeat, function(deltaTime: number) 
			emitter.WorldCFrame = parent.CFrame
		end)
	end
	
	soundTrove:Connect(sound.Ended, function(soundId: string) 
		if not sound.Looped then
			self.destroy()
		end	
	end)
	
	soundTrove:Connect(sound:GetPropertyChangedSignal("Volume"), function(...: any) 
		soundObject.Volume = sound.Volume	
	end)
	
	-- Make Table
	self.trove = soundTrove
	self.sound = soundObject
	self.emitter = emitter
	self.destroy = function()
		currentSounds[sound] = nil
		self.trove:Destroy()
	end
	
	currentSounds[sound] = self
	
	-- Prepare Old
	sound.Parent = oldSound_Container
	
	-- return
	return self
end

-- initialize
system.initialize = function()
	runService:BindToRenderStep("audioSystem", 1, function()
		-- optimization
		if settings.limit and dicitionaryExpansion.length(currentSounds) >= settings.limit then
			local lastSound = dicitionaryExpansion.find(currentSounds, dicitionaryExpansion.length(currentSounds))
			if lastSound then
				lastSound.destroy()
			end
		end
		
		-- sounds
		for _, soundMeta in currentSounds do
			local facing = camera.CFrame
			local vector = (soundMeta.sound.emitter.Position - camera.CFrame.Position).Unit
			facing = Vector3.new(facing.X, 0, facing.Z)	
			vector = Vector3.new(vector.X, 0, vector.Z)	
			
			local angle = math.acos(Vector3.new().Dot(facing, vector) / (facing.Magnitude * vector.Magnitude))
			soundMeta.sound.emitter.EarSimulation.HighGain = -(25 * ((angle / math.pi)^2))
		end

		-- test
		print(dicitionaryExpansion.length(currentSounds))
	end)
	
	-- Existed Sounds
	for _, object : Instance in workspace:GetDescendants() do
		if object:IsA("Sound") and system.sanityCheck(object) then
			system.registerSound(object)
		end
	end
	
	-- New Sound
	workspace.DescendantAdded:Connect(function(object : Instance)
		if object:IsA("Sound") and system.sanityCheck(object) then
			system.registerSound(object)
		end
	end)
end

--// return
return system

Maybe I’ve done the most common mistake or something, but I’m really tired rn cause haven’t slept for long time
Thank you in advance

[nvishurl]

one line fixed everything

system.sanityCheck = function(sound : Sound)
	if not sound.Archivable then return nil end
	if sound:IsDescendantOf(soundContainer) then return nil end
	
	return true
end