Complex sentence: Kulathoopuzha Ravi (before changing his name to Raveendran) had earlier sung 30 odd songs under various noted music directors including Baburaj, but a lack of opportunities in the field made him a dubbing artist and a singer in an orchestra troop.
Split into simpler sentences: Kulathoopuzha Ravi (before changing his name to Raveendran) earlier had tested his vocal cords for 30 odd songs under various noted music directors including Baburaj. Lack of opportunities in the field made him a dubbing artist and a singer in an orchestra troop.