AudioEmitter

local Players = game:GetService("Players")

local emitterPart = Instance.new("Part")
emitterPart.Anchored = true
emitterPart.Position = Vector3.new(0, 0, 0)
emitterPart.Parent = workspace

local emitter: AudioEmitter = Instance.new("AudioEmitter")
emitter.Parent = emitterPart

local curve = {}
curve[10] = 1 -- Within a distance of 10 studs, listeners hear this emitter at full volume
curve[100] = 0.4 -- At a distance of 100 studs, listeners hear this emitter at 40% volume
curve[300] = 0 -- At any distance farther than 300 studs, listeners cannot hear this emitter
emitter:SetDistanceAttenuation(curve)

-- Replicate the rolloff curve from the old voice implementation
-- Default voice without the new audio API uses quadratic rolloff ranging from 7 to 80 studs
local MIN_DISTANCE = 7
local MAX_DISTANCE = 80
local CURVE_STEP_SIZE = 2

local voiceCurve = {}
for i = MIN_DISTANCE, MAX_DISTANCE, CURVE_STEP_SIZE do
	voiceCurve[i] = ((i - MIN_DISTANCE) - (MAX_DISTANCE - MIN_DISTANCE)) ^ 2 / (MAX_DISTANCE - MIN_DISTANCE) ^ 2
end
voiceCurve[MAX_DISTANCE] = 0

local function setVoiceCurve(character)
	local voiceEmitter: AudioEmitter = character:WaitForChild("AudioEmitter")
	voiceEmitter:SetDistanceAttenuation(voiceCurve)
end

for _, player in Players:GetPlayers() do
	if player.Character then
		setVoiceCurve(player.Character)
	end
	player.CharacterAdded:Connect(setVoiceCurve)
end