I don't have the compiler since this is my laptop so it may not compile but you can try this script:
Sound Property LuteSound auto
int instanceID1
Event OnUpdate()
If Input.IsKeyPressed(39) == 1
Game.ForceThirdPerson()
Game.DisablePlayerControls(True, True, True, False, True, False, True)
Utility.wait(2.0)
PlayerREF.playidle (IdleLuteStart)
Utility.wait(1.0)
instanceID1 = DDDplaylutesound.Play(PlayerREF)
EndIf
If Input.IsKeyPressed(207) == 1
Sound.StopInstance(instanceID1)
PlayerREF.playidle (IdleLooseStop)
Game.EnablePlayerControls()
EndIf
EndEvent