Let's start jamming Traffic - (2010 Remaster, Must Die) John Barleycorn chords, Practice these chords sequence - A, D, Em, A, G, Em and G. Begin your practice at a relaxed 81 BPM, then work your way up to the song's BPM of 162. With the song's key of E Minor, set your capo to fit your vocal range and chord choice.