The principal single from Rajinikanth‘s Kaala released on Tuesday. Titled ‘Semma Weightu’, the tune has been propelled on May Day, in front of the sound dispatch of the film which is planned to happen on May 9 in Chennai.It is anything but a simple incident that the tune has discharged on Labor Day. The mystery of the film, which discharged on March 2, saw Rajinikanth disclosing to Nana Patekar, who plays the adversary, that the shading dark means the work of average citizens. While Kaala is wearing dark, the opponent shows up in white. In the film, Rajinikanth plays a wear in Mumbai, who battles for the privileges of abused Tamils in his chawl.’Semma Weightu’ has been co-composed by Arunraja Kamaraj, who sang the electrifying ‘Neruppuda’ number from Kabali. The other lycricist is Dopeadelicz. Music writer Santosh Narayanan, who’d already chipped away at Kabali, declared that the verses of ‘Semma Weightu’ have contributions from web-based social networking clients. The melody has been sung by Hariharasudhan and Santosh Narayanan.