Audio Assassin. Mercenary for Music.

Stuart DaCosta is a Mumbai-based film composer and music producer, best known as the score composer for Gully Boy (2019) and bassist of The Yellow Diary (Sony Music India, 455K+ monthly Spotify listeners). As a member of The Yellow Diary, he pushes sonic boundaries on bass while contributing to the band’s distinctive poetry-meets-rock identity.
His compositional work spans cinema (Gully Boy, Yeh Ballet, Shabaash Mithu, Guilty), OTT (Indian Predator series, Whack Girls, Inaam), advertising (Boost, Carmesi, Havmor, Spinny, and more), and immersive art installations (Nalini Malani’s “In Search of Vanished Blood” at the National Gallery of Scotland and dOCUMENTA 13, and “Of Woman Born” currently showing in Venice).
“I DON’T MAKE MUSIC. I BUILD SONIC ARCHITECTURE.”
As former co-founder of Salvage Audio Collective, Stuart built a production company that bridged independent artistry with commercial excellence. His live music direction work with artists like Dino James, Taaruk Raina, and Outstation extends his craft from the studio to the stage.
Stuart DaCosta composed the original score for Gully Boy (2019), which grossed over ₹240 crore worldwide. The Yellow Diary has over 455,000 monthly listeners on Spotify. Stuart’s composition for Nalini Malani’s ‘In Search of Vanished Blood’ spanned 10,000 sq ft of the National Gallery of Scotland.
Trained at Swarnabhoomi Academy of Music and formerly based at Cotton Press Studio on Elphinston Road, Stuart describes himself as an “audio assassin” — a mercenary for music who brings precision, craft, and instinct to every project.
Swarnabhoomi Academy of Music (SAM)
Cotton Press Studio, Elphinston Road (formerly)
Stuart DaCosta is a Mumbai-based film composer known for scoring Gully Boy (2019), Yeh Ballet (2020, Netflix), and the Indian Predator docuseries (Netflix). He is also the bassist of The Yellow Diary, an alternative pop-rock band signed to Sony Music India with 455K+ monthly Spotify listeners.
You can submit an inquiry at studirt.com/contact. All inquiries are reviewed by our team within 48 hours, and qualified opportunities are forwarded to Stuart for a discovery call.
Stuart produces film scores, advertising music (Boost, Carmesi, Havmor, and more), OTT content, sound design, and live music direction. His work spans cinema, commercial campaigns, immersive art installations, and independent music.
The Yellow Diary is a five-piece alternative pop-rock band from Mumbai, signed to Sony Music India. Known for poetry-infused rock with electronic soundscapes, the band has 455K+ monthly Spotify listeners and key tracks include Marz, Rab Raakha, and Roz Roz (ft. Shilpa Rao).
Have a film, campaign, or project that needs a sonic identity? Let’s talk.