I don't remember the actual number but I think there were like 5 to 7 rounds. Here's something that can help you, use your phone or something else, to take a video of each time the stones play a tune, pause the game, write down the combination after replaying it (like 5-3-1-2, etc.), and replicate it with the crystals. Took me a WHILE to do it, but I was able to, finally. I sucked at it big time lol