After figuring ou the whacky orchestra at the conservatory theater and going backstage, you wind up in a cave where you have to figure out a sequence of notes and which blue crystals they belong to. I have thrown the green crystal and the wafer into the boiling pot and gotten the clear crystal, have figured out the location of the 4 notes(blue crystals) from the map, but cant get anything to happen-supposed to pick up a copper symbol(not sure where) after the correct notes have been played.Would sure appreciate some suggestions- have looked a 2 or 3 WTs, but they all say the same thing.