To learn Marianas Trench - Astoria chords, your first step should be understanding these chords - G, F, C, Bb, F, C, Dm, F and Am in sequence. A good strategy is to initiate at 72 BPM and then accelerate to the track's regular speed of 145 BPM. With F Major as the song's key, tweak the capo to cater to your vocal pitch and chord likes.