He worked under noted composers including Raj-Koti, A. He then started programming with his Roland MC-500 and went on to work as a programmer under more than twenty five music directors in Tamil, Telugu, Hindi and Malayalam, working in more than 600 projects till the year 2000. After befitting as a guitar player, he started playing keyboard and developed interest over synthesizers. He started his music career as a guitarist in 1987 at age twelve. Harris scored the highest mark in Asia on his 4th grade exam of Trinity College of Music, London.
His father wanted him to become a guitarist and made him learn classical guitar from Mr.A.Abdul Sattar. At age six, Harris began his formal training in carnatic music. Jayakumar, was a noted film guitarist and an assistant to Malayalam music director Shyam and later became a noted musician and film composer. He studied at Krishnaswamy Matric School, K. Harris Jayaraj was brought up in Chennai, He was born into a middle class Tamil Christian Nadar family.
