Voice chat

Turning it on

1. Experience Settings › Communication: enable the microphone (voice chat).
2. VoiceChatService in the Explorer: set UseAudioApi = Enabled. Without this, voice is an internal black box you can't wire.
3. Leave EnableDefaultVoice on for automatic proximity chat, or turn it off to build your own.

Only voice-eligible players get a microphone stream. That means age-checked or verified accounts that have voice turned on. Everyone else can still hear if their settings allow it. Use VoiceChatService:IsVoiceEnabledForUserIdAsync to tell who can speak.

What Roblox builds for you

With UseAudioApi = Enabled and EnableDefaultVoice = true, when a voice-eligible player joins, Roblox creates:

Object	Parent	Default name
AudioDeviceInput (their mic)	the Player	AudioDeviceInput
AudioEmitter (their mouth)	their Character, made again on every respawn	AudioEmitter
Wire mic → emitter
AudioListener (your ears)	Workspace.CurrentCamera

The emitters use VoiceChatService.DefaultDistanceAttenuation: inverse-square, or Legacy (7–80 studs). Acoustic simulation applies to voice when it's enabled.

With EnableDefaultVoice = false, you still get the AudioDeviceInputs. You don't get the emitters or the listener. Wire mics wherever you want: a radio bus, a PA system, or nowhere (speech-to-text only).

Controls you have

Want	Do	Where
Mute a player for everyone	AudioDeviceInput.Muted = true	Server
Push-to-talk	Toggle the local player's Muted on key down and up	Client
Only teammates can hear	AccessType = Allow + SetUserIdAccessList(teamUserIds)	Server
Block certain people	AccessType = Deny + list	Server
Change the range	emitter:SetDistanceAttenuation(curve) or a preset mode	Server (replicates) or client (local only)
Make voices directional	emitter:SetAngleAttenuation({[0]=1,[90]=0.6,[180]=0.3})	Either
Process a voice (helmet, radio, robot)	Insert effects between the mic and the emitter	Server to affect everyone, client for one listener
See who's talking	Wire the mic to an AudioAnalyzer and poll RmsLevel	Client
Voice commands	Wire the mic to AudioSpeechToText	Client

AudioDeviceInput.Active reflects the player's own mic button in the Roblox UI. You can read it but not set it. A player is heard only when Active is true and Muted is false.

Respect the platform

Voice still goes through Roblox's safety systems and the player's own mute and block settings. The API gives you routing and processing, never the raw audio. You can't spectrum-analyze or record a microphone. Don't build mechanics that pressure players to unmute.

Team chat (server)

Taken from Roblox's voice chat tutorial and trimmed:

local Players = game:GetService("Players")
local Teams = game:GetService("Teams")

local function updateTeam(team: Team)
    local userIds = {}
    for _, player in team:GetPlayers() do
        table.insert(userIds, player.UserId)
    end
    for _, player in team:GetPlayers() do
        local mic = player:FindFirstChild("AudioDeviceInput") :: AudioDeviceInput?
        if mic then
            mic.AccessType = Enum.AccessModifierType.Allow
            mic:SetUserIdAccessList(userIds)
        end
    end
end

for _, team in Teams:GetTeams() do
    team.PlayerAdded:Connect(function() updateTeam(team) end)
    team.PlayerRemoved:Connect(function() updateTeam(team) end)
    updateTeam(team)
end

-- The mic can arrive after the player joins.
Players.PlayerAdded:Connect(function(player)
    player.ChildAdded:Connect(function(child)
        if child:IsA("AudioDeviceInput") and player.Team then
            updateTeam(player.Team)
        end
    end)
end)

Push-to-talk (client)

-- LocalScript (or a Script with RunContext = Client)
local Players = game:GetService("Players")
local UserInputService = game:GetService("UserInputService")

local mic = Players.LocalPlayer:WaitForChild("AudioDeviceInput") :: AudioDeviceInput
local KEY = Enum.KeyCode.V

mic.Muted = true
UserInputService.InputBegan:Connect(function(input, processed)
    if not processed and input.KeyCode == KEY then mic.Muted = false end
end)
UserInputService.InputEnded:Connect(function(input)
    if input.KeyCode == KEY then mic.Muted = true end
end)

More voice recipes, including radios, filters and indicators, are in Recipes.