While you are playing this musical instrument, you can create harmless, illusory visual and auditory effects within a 5-foot-radius sphere centered on the instrument.  If you are a bard, the radius increases to 15 feet.  Any creature caught in the radius must make an INT save; DC 10 + your WIS mod.  On a failed save creatures within the illusion fall under the effect of this instrument.  On a successful save, creatures know they are in an illusion.  Any creature caught in the illusion can make an INT save to break free at the end of their turn if what they are seeing or hearing contradicts what they already know to be true, or whenever they are attacked.

The magical effects have no substance and any creature within range thinks the illusion is real, so long as it makes logical sense to those creatures and falls in line with what they already know and believe.  Other creatures caught in the effect can be seen and heard by anyone else in the radius.  The effects end when you stop playing.

Notes: Requires attunement for one hour.