Let's start jamming Tri Yann - Sein 1940 chords, Practice these chords sequence - D, Em, G, Dm, Gm, Cm, D, B and Em. A good strategy is to initiate at 38 BPM and then accelerate to the track's regular speed of 78 BPM. With an eye on the song's key G Major, set the capo that best suits your vocal range.