Talk:Waterfall/Puzzles/@comment-27981463-20160315163144/@comment-4360159-20160315181713

Assuming you're actually playing the piano properly by pressing the "z" key:

You might have to give the statue some shelter, if you haven't already. (I don't know if that's actually required before that puzzle may be solved.)

Otherwise, the piano puzzle solution listed in this article is correct (I just watched a video to verify it).