His village has been facing oppression from the upper caste community for decades.
The rest of the songs and the film's teaser or trailer will be released in the next few weeks.
Sharing a photo with director Mari Selvaraj, Santosh Narayanan said it was a victory for so many folk artists.
Dhanush also hinted that there is more treat ahead for the fans on the cards.
The team wrapped up the shoot on 9th December and the makers had announced that the film will hit the big screens on April 9th.
In 2013, the actor made his Bollywood debut in Raanjhanaa movie as a lead role starring alongside stunning Sonam Kapoor.