Apropos to nothing, I was watching a Youtube video of someone playing the fiddle, and violinist looked a lot like Luna Lovegood (wasn't Lynch, though). I started trying to think if any of the characters in HP actually play a musical instrument. I know in third film Flitwick is conducting a student chorus that also appears to play frogs, and the Weird Sisters apparently play instruments, or do in the film, as well as the infamous Stubby Boardman, not that we ever see him. Celestina Warbeck sings. The whole school sings the school song, but I don't think instruments are mentioned. I believe the ghosts have some sort of band at Nick's deathday party, but that might be the only direct reference other than Harry's little carved flute and the charmed harp used on Fluffy in book one, neither of which is ever seen again. Do we ever hear that an actual character in the books plays any other musical instrument?