This is a 2 lock gadget cache. The first lock is as easy to open as 1 2 3 because thats the code. The sound of music is a movie title but not the right one. Its the key to opening the second lock. You must play a series of numbers on the provided instrument to make the recognizable tune. This movie is as FAR from the sound of music as you can get. Even if you have never seen the movie you probaly have heard the tune. The code for the second lock is the first word in the movie title. This cache is in a very large oak tree and you have to step up into the base of the tree about 3 feet off the ground