Overrides the location sounds are heard from. Once added to the scene tree and enabled using [method make_current], this node will override the location sounds are heard from. Only one [Listener2D] can be current. Using [method make_current] will disable the previous [Listener2D]. If there is no active [Listener2D] in the current [Viewport], center of the screen will be used as a hearing point for the audio. [Listener2D] needs to be inside [SceneTree] to function. Disables the [Listener2D]. If it's not set as current, this method will have no effect. Returns [code]true[/code] if this [Listener2D] is currently active. Makes the [Listener2D] active, setting it as the hearing point for the sounds. If there is already another active [Listener2D], it will be disabled. This method will have no effect if the [Listener2D] is not added to [SceneTree].