The soundtrack and film score were composed by A. R. Rahman. The lyrics were written by Vairamuthu whereas Sirivennela Sitaramasastri wrote the Telugu lyrics for the dubbed version. The soundtrack album was noted to be "youthful" with Carnatic themes. Since Leela Samson plays the role of an old Carnatic singer in the film, there is a tinge of Carnatic music in the film. Ratnam wanted an original soundtrack from Rahman that is contemporary as well as trendy. Rahman's son, A. R. Ameen sang the track "Maula Wa Sallim" in Arabic. A first preview of the song "Mental Manadhil (Male version)" was released on 13 March 2015, while the full song was released as a single on 15 March 2015. The soundtrack album was released by Sony Music India on the midnight of 3 April 2015.
Chinmayi turned a voice actor for the Tamil film Sillunu Oru Kadhal (2006), speaking dubbing for actress Bhumika Chawla, an opportunity that came through A. R. Rahman's office. Since then, she has dubbed for several lead actresses in Tamil films, including Tamannaah Bhatia, Sameera Reddy, Samantha Ruth Prabhu and Trisha Krishnan. She has also provided her voice in dubbed Telugu films. She dubbed for the critically acclaimed fictional character Jessie who was portrayed by Trisha in Vinnaithaandi Varuvaaya. The same character appeared in the film's Telugu version Ye Maaya Chesave and was portrayed by Samantha, while being portrayed by Amy Jackson in the Hindi version Ek Deewana Tha. Chinmayi dubbed for the character in all three films and won the Nandi Award for Best Female Dubbing Artist for Ye Maaya Chesave in 2010. Chinmayi dubbed in Vettai for Sameera Reddy and has dubbed for her in all Tamil movies. She dubbed for Samantha Ruth Prabhu in Eega in Telugu and its Tamil version Naan Ee in 2012. She dubbed voice for Nayanthara in the Tamil version of the movie Sri Rama Rajyam, and in the telugu version of Naanum Rowdy Dhaan. Chinmayi has also been the voice of Lavanya Tripathi in many of her movies, starting from Andala Rakshasi, then Bhale Bhale Magadivoy, Maayavan, Chaavu Kaburu Challaga, and A1 Express. Chinmayi has dubbed for Samantha Ruth Prabhu in many films like Rabhasa, Atharintiki Daaredi, Ramayya Vasthavayya, Seethamma Vakitlo Sirimalle Chettu, 24, Oh! Baby and many more in Telugu. 2b1af7f3a8