Capo: 2nd fret

You put a capo on the second fret of a guitar (or similar instrument). Any creature with an intelligence score of 8 or higher who sees you do this can use their reaction to make a DC 15 Wisdom saving throw. On a success, they can chose to cover their ears and become deafened until they chose to stop. Creatures proficient with the guitar (or similar instrument) automatically succeed this saving throw, granted they see you put on the capo.

You start playing "Wonderwall" by Oasis. All creatures with an intelligence score of 8 or higher who can hear the song must make a Charisma saving throw against your spell save DC. Creatures proficient with the guitar (or similar instrument) automatically fail this saving throw. On a failed save, each affected creature takes 3d8 Psychic damage and is Stunned for as long as they hear you playing. While this spell is active, you cannot cast spells that use Verbal or Somatic components. At the start of your subsequent turns, creatures can reattempt the Charisma saving throw, ending the effects on a success.

If you cast this spell at a higher level, the damage increases by 1d8 per spell level.