Yo Chief, got a question about the Shinra Mansion in Nibelheim. Apparently I missed this so when I was going back through it (looking to see if I encounter that Ziegfried lock), I noticed clue #5 on the paper that gives you the safe hints. I played the piano inside the mansion and got the trigger dialogue but was unable to find anything different of note. Did you merely add that as something you had to do to get the safe to unlock, or is something extra supposed to happen w/that?
EDIT: Asking about when you first get there still in Disc 1, sorry I shoulda specified.