Band Riddle

Background: The Informant was a band member in high school. The riddle was told by the band teacher.

Q: What music instrument never tells the truth?
A: A lyre.
My band teacher told us this riddle during rehearsal. I didn’t find it funny at the time. It’s pretty much a dad joke.

The instrument has the same pronunciation as the word “liar”. This riddle requires knowledge in the music field, which also explained the occasion and audience of the riddle.