To learn C.S.I - Ongii chords, grasp the musical fabric of the song with this sequence - D, C#m, B, B, E, D, A, E and G of chords. Start with a comfortable 60 BPM and as you become proficient, aim for the song's BPM of 120. With A Major as the song's key, tweak the capo to cater to your vocal pitch and chord likes.