You will notice the keyword specifically includes This is not arbitrary. Sony Music India re-released the soundtrack in 2012 and again in 2018 via streaming services.
If you are looking for a or technical analysis, academic works like "The Cinematic Soundscape" by Budhaditya Chattopadhyay analyze the film's "spatial topography" and use of sync sound techniques to create immersive environments. Delhi-6 Music Review | Blank Slate - WordPress.com delhi6 2009 flac verified