with P. Suseela. After the partnership dissolved, he sang with Viswanathan and Ramamoorthy separately. During their early years, they worked with established male singers such as Thiruchi Loganathan, C. S. Jayaraman, S. C. Krishnan, Ghantasala and V. N. Sundharam. The female singers were P. A. Periyanayaki, M. L. Vasanthakumari, R. Balasaraswathi Devi, P. Leela, Jikki, T. V. Rathnam, T. S. Bagavathi, M. S. Rajeswari, K. Jamuna Rani, K. Rani, A. P. Komala and A. G. Rathnamala. The singing actors N. S. Krishnan, T. A. Madhuram, V. Nagayya, T. R. Mahalingam, K. R. Ramasamy, J. P. Chandrababu, P. Bhanumathi and S. Varalakshmi also sang for the duo. G. K. Venkatesh, M. S. Viswanathan's friend and assistant, sang a few songs as well. T. M. Soundararajan was Viswanathan's favourite singer and Jikki, followed by P. Susheela, were the duo's primary female singers. They were divided on A. M. Rajah; although Ramamoorthy favoured him, Viswanathan had a personality conflict dating back to Genova. Rajah sang only five Viswanathan–Ramamoorthy songs, at the height of his career during the 1950s. He voiced Gemini Ganesan, the actor for whom he was the primary voice, only in Padhi Bhakti. P. Leela, Seerkazhi Govindarajan, Sarojini, K. Jamuna Rani, M. S. Rajeswari and A. L. Raghavan owe their 1950s and 1960s vocal success primarily to the duo, particularly to Viswanathan. Directors such as B. R. Panthulu, B. S. Ranga, Krishnan–Panju, A. Bhimsingh, P. Madhavan, C. V. Sridhar, T. R. Ramanna and A. C. Tirulokchandar worked with Viswanathan–Ramamoorthy frequently until 1965. K. Balachander never worked with the duo, preferring to work with Viswanathan alone even before the split. Mellisai Mannargal On 16 June 1963, Viswanathan and Ramamoorthy were given the title of Mellisai Mannargal (, Kings of Light Music) by Sivaji Ganesan at a Madras Triplicane Cultural Academy ceremony sponsored by T. M. Ramachandran, director C. V. Sridhar and Chitralaya Gobu of the Hindu Group of Publications. Split Viswanathan and Ramamoorthy split up after the release of Aayirathil Oruvan on 9 July 1965. They composed for films separately, with the assistants remaining with Viswanathan. Although producer-directors T. R. Ramanna and A. Bhimsingh were saddened by the development, they worked with both men individually. The split was the result of interpersonal issues. In 1964, C. V. Sridhar directed Kalai Kovil, starring S. V. Subbaiah, R. Muthuraman, Chandrakantha, Nagesh, V. Gopalakrishnan and V. S. Raghavan; Viswanathan and Ramamoorthy produced the film and