The most melodic of notes, the most soothing of tunes.
"It would help if I knew how to play the thing, though."
"Isn't it just a skillet?"
"That's what I thought... Now I'm not so sure."
Have a large room that elevates either up or down when triggering a trap. The floor can bring the players to new levels, where a mighty beast roams, or the floor flattens the players into the ceiling or drop into a pit of lava.