Composer Santhosh Narayanan updated through his twitter handle today that he has begun composing for Dhanush's upcoming film with director Mari Selvaraj which tentatively goes by D41. The musician also said that he has produced a song using folk artists from  Tamil Nadu.

Had the honour of commencing the song production of dear @mari_selvaraj’s @dhanushkraja sir’s movie with some amazing folk artists from South Tamil Nadu.Thank you @theVcreations Thanu sir,my sound team and all !

— Santhosh Narayanan (@Music_Santhosh) November 6, 2019

Produced by Kalaipuli Thanu, D41 is said to star Malayalam actor Rajisha Vijayan, Mollywood actor-filmmaker Lal and is most likely to be titled Karnan according to industry buzz.