Rahman began composing for the film in early 2016 and by May it was revealed that his two songs had been completed.^[2] As the film was a musical, Menon required the songs to be completed before production began and by November 2016, Rahman had finished composing nine songs for that film and composed parts of the background score.^[3][4] The lyrics were written by Madhan Karky, Arunraja Kamaraj and the late Na. Muthukumar, who worked in the film before his death in August 2016.^[5]

The official track list of songs was released long before the audio release by A. R. Rahman, in his Twitter page, on 19 November 2018.^[6][7]

A.R. Rahman used many different instruments for this soundtrack. In "A Journey of Peter", Peter employed instruments from North Rajasthan and the Northeast.^[8] These musical instruments are part of the background score. Rahman and his ensemble Qutub-E-Kripa adopted Indian Regional music and Carnatic music.^[9] Rahman also used a western African musical instrument called Kora. It is a 21 string lute-bridge-harp extensively used in Africa.^[10]

Sound Engineers edit

• A R Rahman, Rasigan, A R Venkatesan
• Mixed by - P. A. Deepak, T R Krishna Chetan, Karthik Sekaran, Jerry Vincent
• Additional Programming - Santhosh Dhayanidhi
• Mastered by - Suresh Perumal
• MFiT mastered by - Suresh Perumal

Musicians edit

• Guitar - Sunil Milner, Keba Jeremiah
• Flute - Kamalakar
• Kanjira Player - B Shree Sundarkumar
• Sunshine Orchestra Conducted by VJ Srinivasamurthy
• Musicians Coordinators - Noell James, TM Faizuddin, Abdul Haiyum
• Musicians Fixer - R Samidurai^{[11][12][13][14][15]}