How do you use a Playstation controller for Rock Band?

You can play as the drums, lead guitar, Bass Guitar, and singer. For the drums, you hit the notes as they come on the screen and you use drum sticks. For guitar, you hold the corresponding notes as they come on the screen then you strum once they get to a certain area in the screen. For singer, (this ones pretty obvious) you sing the Words to the song as they come on the screen and you must raise your voice higher and lower depending on what is says to do and you sing into a microphone.