Let's start jamming Gren - Sen chords, practice the chord sequence B, Db, Ebm, B, Gb, B, Db, Ab, Ebm and Db. To master the tempo, it's wise to start at 66 BPM before aiming for the song's 133 BPM. Adjust the capo based on your vocal range and chord preference, keeping the song's key of Gb Major in mind.