Disruptive Song

You play a discordant song on a instrument you are proficient with that causes pain to those that hear it. Choose a creature you see within 60 ft that can hear you. That creature must succeed on a Wisdom saving throw. On a failure the creature takes 3d8 psychic damage and is stunned until the end of its turn, on a success the target takes half damage and is not stunned. Creatures who are deaf automatically succeed the saving throw.  

Casting at a higher level allows you to target an additional creature. For every spell slot above 3rd level you can target an additional creature.