What is "viswanathan-ramamoorthy"

Viswanathan–Ramamoorthy were a South Indian music director duo, composed of M. S. Viswanathan and T. K. Ramamoorthy. The duo had worked together from Panam in 1952 for over 100 films, before splitting with the release of Aayirathil Oruvan in 1965. After the split T. K. Ramamoorthy worked on 16 films from 1966 – 1986. The duo reunited in 1995 after 30 years for Engirundho Vandhan.