Tharun Gopi's Kaalai starring Silambarasan is being shot rapidly. The movie which stars Vedhika in the female lead has musical score by G V Prakash Kumar. The latest buzz is that G V Prakash Kumar and Silambarasan would be off to Bangkok soon to do the remixing and background score for the movie. Bangkok is turning out to be a favorite destination for Tamil music composers. Silambarasan's Vallavan had Yuvanshankar Raja taking off to Bangkok to compose the tunes.