Controlling Sirens

Working with sirens is a more complicated topic with EVH. You can read the status of sirens on the client and server, but changing sirens is a client-side only operation.

Reading the current siren state

Unlike functions, sirens are not stored as attributes on the vehicle. Instead, you must use the sound properties to get the current siren state.

Here's a code snippet showing how to get the current siren state of a vehicle:

-- Client or server-side script
local siren = ... -- reference to the siren sound object

local isSirenOn = siren.IsPlaying
print("Is siren on: ", isSirenOn)

To do something whenever the siren state changes, you can use the GetPropertyChangedSignal function like so:

-- Assuming same context as above
siren:GetPropertyChangedSignal("IsPlaying"):Connect(function()
    local isSirenOn = siren.IsPlaying
    print("Siren state changed. Is siren on: ", isSirenOn)
end)

Setting the siren state

As mentioned earlier, changing the siren state is a client-side only operation. This must be done via the RemoteEvent.

Here's a code snippet showing how to change the siren:

-- Client-side script
local car = ... -- reference to the vehicle model
local evhEvent = car:WaitForChild("EVHEvent")

-- Toggle standard siren
evhEvent:FireServer("Input", Enum.UserInputState.Begin, Enum.UserInputType.Keyboard, Enum.KeyCode.R) -- replace 'R' with your siren keybind

-- Turn hold siren on
evhEvent:FireServer("Input", Enum.UserInputState.Begin, Enum.UserInputType.Keyboard, Enum.KeyCode.H) -- replace 'H' with your hold siren keybind
-- Turn hold siren off
evhEvent:FireServer("Input", Enum.UserInputState.End, Enum.UserInputType.Keyboard, Enum.KeyCode.H) -- replace 'H' with your hold siren keybind

All Done!

If you need to dynamically load sirens and keybinds, please see the Reading Siren Configurations section in the documentation for more information.