I don't know shit about human music. But. You should get instant gratification for your gift.
Listen well.
[Caliborn brings the harmonica to his mouth, and begins to play. Which, as Calliope might say, is being VERY generous. Another way to describe it might be to say that an attempt was made. Air enters his lungs or lung equivalent, and then is blown into the instrument to produce a noise that can definitely be described as "harmonica sounds."]
[He is watching her closely, trying to gauge the most annoying notes.]