K.V.Mahadevan

Pic "Entha paadalaaga irunthaalum karnataka isayin touch irukka vendum. Antha adippadayil thaan isai amaikka vendum endra karuthullavan naan. Appadi thaan ennal tune podave mudiyum"

Irunthaalum ivar "manapparai maadu katti","poravale poravale ponnurangam' pondra folk tunes kooda potrukkaar.

KVM was a sishya of S.V. Venkatraman. Apparently the musical instrument Nadhaswaram was what made him took so much involvement in music. It seems he takes about 30 mins for composing a song.
An article on KVM - by vAmanan in Cinema Express
Another article on KVM - in kungumam.
Pazhaiya Paadal Pakkam page on KVM - contains info on his movies and songs.
Creativity of KVM - Read the interesting discussions!