Matthew Gatsos first started playing music in early grade school. The first instrument he practiced was the alto saxophone. After three years he moved onto learning the piano. Although he did take private piano lessons for a few years in his youth and took music courses later in high school most of his music training did not come until later. After high school Gatsos moved through several bands composing and playing keyboards. Gatsos left the bands behind and decided to go to college to major in Accounting. Although majoring in and receiving a baccalaureate degree in Business Administration with a concentration in Accounting, Gatsos did take numerous musical courses throughout his years at California State University Stanislaus. He also has been scoring projects for Digital Shadow films since 2004 among other collaborations with different filmmakers.