Rajamani is a late music director who had been associated with music in every form right from his childhood. Music had run in his generation, and his father and grandfather too were renowned musicians in Malayalam industry. Not many know he is associated with over 700 movies in providing background score and has recorded in more than ten language movies. 

As we all know music has no language barrier, this musician’s father was really instrumental in shaping his son’s career many times. Also, this music composer hails from a reputed musician family who are experts in Carnatic instruments. His father B.A. Chidambarnanthan was a reputed mridangam player and Carnatic vocal artist who has scored music independently in more than 30 Malayalam movies.  Although Rajamani could not disassociate from Carnatic music, he also had learned Hindustani and Western music. Later, he had played music for a music group and even worked in a private job in West Asia. 
Rajamani kickstarted his career in the musical world with a devotional album named ‘Gangayar Pirakkunnu’ was struck the right chords with the music lovers. Later in his youth days, he had learned to play table and guitar. After becoming a successful guitar player, his father noted his talent and took him to music composer Devarajan. His first role in background score was in G. Devarajan's musical score for a movie named ‘Itha Ivide Vare' in 1977. 
Rajamani’s another successful musical chapter with background score was when he received a half-day call sheet from late R.D. Burman, who was in Chennai then to record a song. Rajamani made use of the vibraphone for the re-recording, and it became a hit so much so that he became one of the best musicians.

Rajamnani’s first Guru was music composer Devarajan and his second guru was music composer Johnson who was also assistant to music composer Devarajan. It was Johnson who introduced Rajamani to the filmy musical world and Rajamani got his first debut as independent music composer for Tamil film ‘Gramathu Kiligal’ (1983), and later he endeavored in the Malayalam film industry after getting his first chance for a movie named ‘Nullinovikkaathe’(1985).  

Rajamani composed music for 70 movies so far.  Some of his best compositions include K.J. Yesudas’s song track such as "Eeran Meghangal" and "Thaalangal Maarunnu" from movie 'Nullinovikkaathe' and "Maanasavenuvil",  a track song sung by K.S. Chithra from movie 'Jeevitham Oru Raagam' and even the melodious song track 'Manjukoottikal' sung by Sreekumar for movie ‘Welcome to Kodaikanal'. 
 

Rajamani had passed away following a cardiac arrest when he was just 60. He passed away in Chennai. His final film recording was for ‘Hide N Seek’. His son Achu Rajamani is also in the music field as a music composer. His super hit film albums are "Ekalavyan”, “ The King”, “Commissioner” etc.