To start learning Akb48 - 大声ダイヤモンド chords, delve into these chords sequence to get the song's feel: C, A, Dm, Bb, C, Am and Dm. For a smooth transition, initiate your practice at 43 BPM and gradually match the song's pace of 87 BPM. To match your vocal range and chord inclination, adjust the capo in line with the key: F Major.