Raghavan has revived several rarely heard difficult raagas, such as Nishada, Gamanashrama, Vakulabharana, Kanakambari and Jhenkaaradhvani.
As a composer, he has created music for the Ashtapadias of Jayadeva, Daasa Saahithya, Vachanas of Shiva- Sharans, and the lyrics of many classical and modern poets in various languages, like, D. V. G, AdiShankaraacharya, Annamaacharya and Naareyanayathi of Kaivara.