To start learning Vishal & Shekhar, Suraj Jagan, Mahalakshmi Iyer - Sadka chords, build your understanding on these basic chords - C, Am, C, G, C, Am, Cm and Am in sequence. A good strategy is to initiate at 72 BPM and then accelerate to the track's regular speed of 144 BPM. With C Major as the song's key, tweak the capo to cater to your vocal pitch and chord likes.
