Unnikrishnan was initiated into Carnatic music at age of 12 by Seshadri, Unnikrishnan. He was inspired by Sangita Kalanidhi Dr. S. Ramanathan. He attended a special workshop for six months on "Veena Dhanammal Bhani" under Sangeetha Kalanidhi T.Brinda and Sangeetha Kalanidhi Dr. T.Vishwa Nathan.

Unnikrishnan is also becoming known for his experimental work. In 2008, he presented a novel jazz concert in Thiruvananthapuram with the Eli Yamin Jazz Quartet and pianist Anil Srinivasan.

He prefers singing classical songs over pop music.

“Carnatic music has grown to a great extent. The taste of the audience has changed with time. Youngsters have developed a taste for the music form and the number of people flocking to these concerts has increased by leaps and bounds. There is novelty in the genre.”He got many awards like "Tamil Nadu's Kalaimamani","Nada Bhushanam","Isai Peroli","Yuva Kala Bharathi","Isayin Punnagai","Isai Selvam","Sangeetha Kalasarathy","Sangeetha Chakravarthy".

“The nuances of Carnatic music may be difficult for a layman to understand but music lovers today are willing to put in the effort to enjoy the music. I have seen youngsters talking about this form of music with enthusiasm. People take time off their busy schedules to come and listen to us artistes. So, it’s our responsibility to ensure that they enjoy the music. Even in reality shows, we ask the contestants to develop a taste for Carnatic music so that they can perform better in light music”.