To learn Vidyasagar, P. Unni Krishnan, Harini - (Original Motion Picture Soundtrack) Sudum Nilavu chords, your practice should emphasize these chord progressions: Ab, Ebm, Ab, Db, Ebm, Ab, Eb and Db. You can use ChordU's Free Tempo controller to start at a slower pace and then gradually increase your speed. With Db Major as the song's key, tweak the capo to cater to your vocal pitch and chord likes.