To start learning Wallen - (Album Version) Mes Rêves chords, centre your learning around these elemetal chords sequence: Bm, Em, F#m, Bm and F#m. Ease into the song by practicing at 64 BPM before reaching the track's full tempo of 128 BPM. Adjust the capo based on your vocal range and chord preference, keeping the song's key of D Major in mind.