A friend and I were playing and we had the good fortune to find a message in a bottle, however we were completely stumped by the second clue. We proceeded to Old Faithful Isle as instructed, and here was our next command:
We proceeded to the north side of the island and descended upon the beach, playing music in front of every thing we could think of. We canvased every tree, every half-buried crate, the small boat on the North beach, and yet to no avail. We spent the better part of an hour playing music in front of every landmark we could find on the island, but never advanced the riddle. Is this riddle even technically solvable? Is it broken? It's pretty damned obtuse (annoyingly so), but we had started to wonder if we were doing something wrong or if there was a technical issue here. This is the only riddle that I've confronted so far in the game that has given me real fits, and I've played since the technical alpha, so I've seen a good number of them.
