Interpreter: Piano, "p," is my favorite musical symbol. It means to play softly. If you're playing a musical instrument and you notice a "p" in the score, you need to play softer. Two p's -- even softer. Four p's -- extremely soft. This is my drawing of a p-tree, which demonstrates no matter how many thousands upon thousands of p's there may be, you'll never reach complete silence. That's my current definition of silence: a very obscure sound.