Stop the current audio track, and leave no current track behind.
Only needed where nothing else follows, since playTrack stops the
track it replaces: a scene whose successor has no music of its own, or a
game going quiet. A no-op when no track is playing.
Stop the current audio track, and leave no current track behind.
Only needed where nothing else follows, since playTrack stops the track it replaces: a scene whose successor has no music of its own, or a game going quiet. A no-op when no track is playing.