the episode is called "the devils hands are idle playthings". when fry plays the holophoner (when making a song for the opera writing it for leela) it sounds like a flute being played, sounds abit like an indian song. Does anyone know this? ive tried searching everywhere!
two of the better known pieces in this episode were Ravel's Bolero (you may recognise this from Torvill & Dean and Dancing on Ice) or Beethoven's Fur Elise.