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Nirvana 的《Dumb》原曲为 Eb 调。 Originally recorded in the sounding key of Eb, 'Dumb' by Nirvana is best approached with a Capo placed on Fret 1, enabling guitarists to execute friendly D shapes while fully preserving the studio pitch. The song relies exclusively on open cowboy chords (Db5, Gb5, Fb5, A#b5, Ab5, D#b5, G#b5, F#b5, Bb5), letting beginners concentrate on tone clarity, ringing string resonance, and sustain without encountering demanding barre finger fatigue. The primary progression challenge lies in switching between Db5 and Gb5: keep your fingers hovering close to the fretboard rather than flying off between changes. Set your metronome at an initial practice tempo of 79 BPM in 4/4 time to master the '↓ - ↓ ↑ - ↑ ↓ ↑' strumming groove, emphasizing steady downstrokes on beats one and three before accelerating toward the studio speed of 110 BPM.