Practice Studio

Metallica - One Pt.4 - Main Solo & Harmony Solo - Guitar Lesson

Sections · Loop · Speed · Metronome

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Key E minor
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Amp Settings

Classic Rock

Gain6
Bass6
Mid7
Treble6
Presence5
Master7
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Roll back the gain slightly and pick near the neck for a warmer, more open crunch.

Metallica Thrash Metal E minor
Capo Advisor 0 E minor · Original key

About One Pt.4 - Main Solo & Harmony Solo


The solo section of "One" is one of the most studied passages in hard rock guitar, and for good reason. The Main Solo builds from melodic, almost vocal phrases into an increasingly frantic climax, demanding clean picking articulation at every stage. The Harmony Solo layers a second guitar part a third above the first, so if you are learning this with a friend, each of you needs to know your own line cold before attempting to blend them. Both solos sit in E minor, which means the E minor pentatonic and natural minor scales are your foundation, though the phrasing asks for string bends and vibrato that go well beyond scale-running. The acceleration toward the end of the main solo is where most players struggle: use the Practice Toolbar to loop that section slowed down until every picked note is even and controlled before bringing the tempo back up. Metallica built this piece around contrasting dynamics, so matching the restrained feel of the early phrases matters as much as nailing the fast runs.

  • The Harmony Solo requires two guitar parts played a third apart, so practise each voice separately before attempting to combine them.
  • Both solos are rooted in E minor, making the natural minor scale and E minor pentatonic your core reference points throughout.
  • The Main Solo accelerates sharply toward its climax, so isolating that final burst with a slow-down tool is the most reliable way to build clean speed.

How to Play One Pt.4 - Main Solo & Harmony Solo

Key: E minor · Tempo: 110 BPM

Use the section loop to isolate a passage, drop the speed below 100%, and set the metronome to 110 BPM to build it up to tempo.

Gibson Les Paul Standard
Guitar

Gibson Les Paul Standard

Kirk Hammett's vintage 1959 'Greeny' Les Paul Standard delivers warmer, more dynamic PAF-style tones that contrast his EMG-equipped ESP guitars, adding organic sustain to his lead work. This guitar's traditional construction gives his solos a thicker, less compressed character than his signature models.

Gibson Les Paul Custom
Guitar

Gibson Les Paul Custom

While not Hammett's primary choice, the Les Paul Custom shares the Les Paul's warm PAF pickup character and thick body resonance, offering heavier players an alternative to Strat-style designs for achieving Metallica's crushing rhythm tones.

Gibson Explorer
Guitar

Gibson Explorer

James Hetfield's early Gibson Explorer established his signature angular shape and thick body tone, delivering the aggressive midrange attack essential to Metallica's crushing rhythm style before his ESP signature models became his primary tool.

Mesa/Boogie Dual Rectifier
Amp

Mesa/Boogie Dual Rectifier

Kirk Hammett's Dual Rectifier heads provide the high-gain, midrange-forward aggression that lets his solos cut through Hetfield's scooped rhythm tone, creating definition and clarity in Metallica's dense wall of distortion.

EMG 81
Pickup

EMG 81

Hetfield's bridge EMG 81 delivers the hot, compressed output with tight low-end that defines Metallica's palm-muted riffs, the ceramic magnet and active preamp cutting through heavy arrangements with focused, aggressive attack.

EMG 60
Pickup

EMG 60

Both guitarists use the neck EMG 60 for warmer, more articulate rhythm tones and smoother lead voicings, balancing the 81's aggression with clearer note definition across Metallica's dense arrangements.

Play with Backing Track

Play with Backing Track

Solo (Backing Track)

Solo (Backing Track)