How do I make a sound continuously play when pressing keys?

can someone help me how I can have a sound continuously playing when pressing keys

function inputStart(obj, gameProcessed, plr) 
    if gameProcessed then return end
    local equiped = player.Character:FindFirstChild(script.Parent.Name)
    if obj.KeyCode == Enum.KeyCode.W then
        if equiped then        
            Up:Play()
            Left:Stop()
            Down:Stop()
            Right:Stop()
            script.Parent.Sound:FireServer() -- Sound Plays
            wait(.5)
            script.Parent.SoundStop:FireServer() -- Sound Stop
        end
    elseif obj.KeyCode == Enum.KeyCode.A then
        if equiped then
            Left:Play()
            Up:Play()
            Down:Stop()
            Right:Stop()
            script.Parent.Sound:FireServer() -- same Sound Plays
            wait(.5)
            script.Parent.SoundStop:FireServer() -- same Sound Stop
-- Code that continues... It's the same thing
        end

Whenever .5 ends, the sounds just have a seizure when I spam keys. I need to find out how to reset wait() or keep the sound playing when spamming keys