“To me, there's no question that using a metronome develops your speed and accuracy. If you're learning scales or you're jamming on parts that you can't quite pull off, it's a must.”

American guitarist and founding member of Dream Theater

John Petrucci is an American guitarist and a founding member of the progressive metal band Dream Theater. He is known for his role in the band and for a career that has also included solo releases. He produced Dream Theater’s albums from Metropolis Pt. 2: Scenes from a Memory (1999) onward, often alongside drummer Mike Portnoy before Portnoy left the group, and later worked alone as producer from A Dramatic Turn of Events (2011). He has also released two solo albums, Suspended Animation (2005) and Terminal Velocity (2020).