Old Man by Neil Young is played in the key of D at a intermediate difficulty level, originally released in the 1970s. It uses 3 chords — D A G — arranged in the I-V-IV progression.
About the I-V-IV progression
The I-V-IV progression is a stripped-down cousin of the four-chord pop pattern with the minor chord removed. It feels direct and uptempo — great for straight-ahead rock and folk strumming.
Playing in the key of D
D major is a bright, ringing key that suits acoustic strumming. D, A, G, and Bm are your main chords, and everything but Bm sits in open position. The Bm barre is the one hurdle for beginners.
Related songs
More songs in the key of D
Learn to play Old Man by Neil Young on guitar. It sits in the key of D and uses the I-V-IV progression with the chords D A G.