Prashant explains about the setting of the film in 1970–80, stating, "In 1978, because of the Cold War between the USA and the erstwhile Soviet Union that had affected places like Iran and Afghanistan, the price of gold went up the highest in the recorded history. Till date, one cannot find another time when the price of gold shot up so much. So, 1978 was the perfect setting for us, because the higher the price of gold, the higher the greed of men.” The film was also inspired by action movies and western movies like The Good, the Bad and the Ugly and For a Few Dollars More. Music Ravi Basrur composed the soundtrack album and the film's score, while Tanishk Bagchi remastered the track "Gali Gali" from Tridev (1989) for the film's Hindi version. The audio rights of the film were purchased by Lahari Music in Kannada, Tamil, Telugu, and Malayalam for , a record sum for any South Indian film; the Hindi version's audio rights were bought by T-Series. The track "Salaam Rocky Bhai" served as the lead single from the soundtrack album. It was released in Kannada, Tamil, Telugu, and Malayalam on 7 December 2018, along with the full soundtrack album; the album for the Hindi version was released on 9 December 2018. The karaoke versions of the songs were released on 27 December 2018. The film's score was released in two volumes; the first volume of the original soundtrack was released on 10 September 2019, and the second volume was released on 12 October 2019. Marketing The first look of the film was released on 3 May 2017. On 8 January 2018, coinciding with Yash's birthday, a one-minute long introductory teaser, with Ananth Nag narrating, was unveiled by the production team. After responding to a fan's request, Yash announced that the film's trailer would be released in October 2018. Farhan Akhtar shared the first look on 6 November 2018 and a second one on 8 November on the occasion of Diwali. The official trailer of the film was released on 9 November 2018. The trailer crossed more than one million views within an hour of its release. Special promotions were planned on 4 December in Chennai, and 6 December in Hyderabad. On 9 December 2018, the makers hosted a pre-release event at the JRC Convention Centre in Hyderabad to promote the film's Telugu version. S. S.