John Peter Petrucci is an American guitarist, composer and producer. He is best known as a founding member of the progressive metal band Dream Theater. He produced or co-produced all of Dream Theater's albums from Metropolis Pt. 2: Scenes from a Memory to Distance Over Time, and has been the sole producer of the band's albums released since A Dramatic Turn of Events. Petrucci has also released two solo albums: Suspended Animation and Terminal Velocity.