To learn Ark - Bangladesh chords, grasp the musical fabric of the song with this sequence - Bbm, Gb, Bbm, Ab, Gb, Ab, Bbm, Ab and Db of chords. Start with a comfortable 69 BPM and as you become proficient, aim for the song's BPM of 138. To match your vocal range and chord inclination, adjust the capo in line with the key: Db Major.