The highest F on the scale?Well, I planned to finish automating my chroma tree farm tonight. That won't happen, though, because I am having way too much fun with the Crystal Orchestra. One thing, though: does it have an "undo" function? It's quite annoying to have tapped out a long tune and have to redo it because of a misclick.
Also, minor bug report: The high F note still produces a buzz sound even if you have all 16 crystals surrounding the Orchestra.