My gui button isn't muting music when clicked. ?

I have a gui TextButton that when its clicked it mutes all running music in the game, I have a folder in the gui that has the music. I used GetChildren() to get all musics to turn them off or set there volume to 0 but it shows an error in the output that says mute/unmute.LocalScript:14: attempt to index number with 'Volume' I cut the error in half because it had alot of refrencing so here it is in short to not waste your time :D

heres code, Thanks for helping

local button = script.Parent

local allMusic = button.Musics:GetChildren()

local unmuted = true
button.MouseButton1Up:Connect(function()
		if unmuted == true then			
			unmuted = false
			button.Text = "Music: OFF"
			for i,v in pairs(allMusic) do	-- beginning of error
				v.Volume = 0	-- The line that has problem.
			end			
		elseif unmuted == false then
			button.Text = "Music: ON"
			for i,v in pairs(allMusic) do
				allMusic.Volume = 1.3	-- Same problem here too.
				end
			unmuted = true		
		
	end
	
end)

Your problem was simple to fix all you had to do is for the For Loop you can't use the Table in this case the (allMusic) as allMusic.Volume = 1.3. For that line do v.Volume = 1

Also this will probably not work if the music aren't sound instances.

This is most likely due to the fact that the model (script.Parent.Musics) has some children that are not sound instances. A good way to fix this is to use :IsA(), this detects if an object is a type of object, e.g.:

local part = workspace.Part -- // part is the model (it is a part)

if part:IsA("Part") then -- // detect if it is a part
   part:Destroy(); -- //  code example
end

For you, you might want to try:

local button = script.Parent

local allMusic = button.Musics:GetChildren()

local unmuted = true
button.MouseButton1Up:Connect(function()
        if unmuted == true then         
            unmuted = false
            button.Text = "Music: OFF"
            for i,v in pairs(allMusic) do 
                if v:IsA("Sound") then
                  v.Volume = 0;
                end
            end         
        elseif unmuted == false then
            button.Text = "Music: ON"
            for i,v in pairs(allMusic) do
                if v:IsA("Sound") then
                v.Volume = 1.3; -- // also dont forget to set v's value not allMusics value
                end 
           end
         unmuted = true;
    end
end)

you do not need to use ; anywhere