How do you make a button locally play a sound upon being clicked?

You should use localscript to play the sound instead of a script. Please note a localscript will only play if it a descendant of: A Player’s Backpack A Player’s character model A Player’s PlayerGui A Player’s PlayerScripts. The ReplicatedFirst service

In order to play a sound for a single player, you need to play said sound in a local script. I would go about this by inserting a local script inside of StarterPlayerScripts and a remote event named "PlaySound" in ReplicatedStorage. The local script should contain the text below:

game.ReplicatedStorage.PlaySound.OnClientEvent:Connect(function()
    sound:Play()
end)

Now just insert a server script inside of the click detector that contains the text below:

script.Parent.MouseClick:Connect(function(plr)
    game.ReplicatedStorage.PlaySound:FireClient(plr)
end)

Everything should work now. If you have any questions feel free to leave a comment and don't forget to accept if my answer worked for you.

Explanation

Local scripts only run on clients not servers but can be exploited, while scripts run on server and cannot be easily exploited than local scripts.

A local script will only work if it's a descendant of the following;

A Player’s Backpack

A Player’s character model

A Player’s PlayerGui

A Player’s PlayerScripts.

The Replicated First Service

Note that you can use local scripts for opening and closing textbuttons, firing remote events and invoking remote functions etc.

You cannot Invoke a Remote function or fire a Remote Event by a normal script as normal scripts run on servers, not clients.

Solution

Assuming that the sound is inside the Workspace, the solution will be as follows;

First of all, insert a local script into that button and the local script would be as follows;

script.Parent.MouseButton1Click:Connect(function() -- Clicked function

    game.Workspace.Sound:Play() -- Change Workspace to wherever your sound is stored

    print("Clicked!") -- You can remove this piece of line if you want to, it just prints Clicked so that you know a local player has clicked it.
end)

Example 2

Let's say your Sound is stored in ReplicatedStorage and your button is in a SurfaceGui, you'll have to make sure if the SurfaceGui is in a part, you'll have to make sure that the Adorneeof the Surface Gui is the part and AlwaysOnTop is checked and the Part is inside the StarterGui. The script would be the same but a little different and sorry if this example sounds confusing..

script.Parent.MouseButton1Click:Connect(function() -- Clicked function
    game.ReplicatedStorage.Sound:Play() -- Places the sound in the ReplicatedStorage
    print("Clicked") -- Remove this line if you want to
end)

The local script will play a sound when 1 player has clicked the button, it will not play the sound for the whole server as I've said before, local scripts only run on clients.

Please make sure to up vote and select this as your answer if it helps you!

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