Stop playing sound {id}. {id} must be previously returned by sound_playevent() or sound_playfile(). On some Linux systems you may need the libcanberra-pulse package, otherwise sound may not stop. On MS-Windows, this does not work for event sound started by sound_playevent(). To stop event sounds, use sound_clear(). Can also be used as a |method|: soundid->sound_stop() {only available when compiled with the |+sound| feature}