To learn Mike Oldfield - Sirius chords, anchor your practice on these foundational sequence of chords - Em, G, Bm, F#m, A, Bm, Em and Bm. To build a solid grasp, start slowly at 57 BPM and then match the original tempo of 114 BPM. Configure the capo to your vocal range and chord preference, remembering the key of D Major.