Unown Spell

Touch one creature or instrument, or any other object capable of emitting noise. That object can be heard from up to 500 ft. away. This can be turned on or off at any time without ending the spell by the creature affected, the creature playing the object affected (if any), or the spellcaster. The sounds emitted do not vary in volume depending on distance (within the spells range) so that those close to it aren't deafened.