To jam and learn The City Of Prague Philharmonic Orchestra - (From High Plains Drifter) Main Theme chords, your primary focus should be mastering these chords sequence: Cm, Bb and Cm. To build a solid grasp, start slowly at 50 BPM and then match the original tempo of 100 BPM. With an eye on the song's key C Minor, set the capo that best suits your vocal range.