Okay, I'm a bit of what you might call notation ignorant. I've generally managed to make my way through reading music, overall I think I've done alright, 5 years of piano helps. But there's this one thing that I'm never quite sure what it means: Ghost Notes! What do people mean when they say "blah blah is a Ghost note." What is a ghost note? is it a harmonic? pull off? Whatever? Help please!