Isai (English: Music,Tamil: இசை) is a 2015 Tamil psychological musical thriller film co-produced, written, directed and composed by S. J. Surya. The film stars himself in the lead role with debutant Sulagna, while Surya also composes the film's music score. This film, which is touted to be of a new genre musical-thriller, went on the floors from 25 May 2012. The audio launch was on November 16, 2014.