Vidyasagar was born to a family of musicians. His father U. Ramachander was a musician who could play eight instruments and his grandfather Varaha Narasimha Murthy was the court 'Vidhwan' for the king of Vijayanagaram Bobili. Vidyasagar started learning vocal classical music and harmonium from his father at the age of four. When he was eight-years-old Vidyasagar joined Dhanraj Master. In fact both A. R. Rahman and Vidyasagar had joined on the same day. Vidyasagar learnt guitar for 3-4 years there, then the piano. Vidyasagar studied Western classical music at the Trinity College of Music, London.
At a tender age of eleven, the child prodigy in Vidyasagar knew how to play a dozen musical instruments and signed up to work as a regular musician for many music directors. Vidyasagar could play for all languages because then, most films had their recording at Chennai. Vidyasagar wanted to then compose his own tunes and have someone else play them. He had assisted various music directors and even done ghost music for some of them. So he had the experience and wanted to compose independently.