To learn Nirvana - Dumb chords, grasp the musical fabric of the song with this sequence - B, Eb, Ab, Gb, Eb, Gb, Eb, Abm and Gb of chords. To build a solid grasp, start slowly at 56 BPM and then match the original tempo of 113 BPM. Considering the song's key of Gb Major, position your capo to suit your vocal and chord preferences.