One
by Metallica
Difficulty Profile
Skill LevelOverall
ExpertRhythm
AdvancedLead
ExpertBass
IntermediateWhy "One" Works Harmonically
Beyond standard guitar tabs and chord charts, discover the exact music theory mechanics, modal interchange, and voice leading choices that give Metallica's classic its unforgettable emotional power.
The Classical B Minor Harmonic Dominant (F#) Shifting to Rhythmic Thrash Metric Sextuplets
The narrative arc of "One" begins as a classical-influenced dark Aeolian lament cycling Bm - G - Em - F#. The harmonic anchor is the sharp F# major dominant chord (borrowed from B Harmonic Minor): its A# leading tone injects unbearable tragic tension that resolves back to the root Bm. As the psychological horror deepens, the composition strips away lyricism and plunges into low E minor sextuplet thrash machine-gun warfare.
Harmonic Progression (Roman Numerals)
i - VI - iv - V (Verse) | i5 - ♭II5 - i5 - ♭III5 (Breakdown)Step-by-Step Movement
- •Bm (i): Chilling minor tonic evoking solitary confinement and isolation.
- •G (VI): Tragic submediant providing brief melodic vulnerability.
- •Em (iv): Minor subdominant elevating the harmonic despair.
- •F# (V): Major dominant with raised A# leading tone creating dramatic harmonic minor gravity.
- •E5 Machine Gun Breakdown: Metric sextuplet rhythmic warfare locking with double kick drums.
Voice Leading & Counterpoint
- ›Inner-voice melody moves smoothly: D (Bm) → D (G) → E (Em) → C#/A# (F#), creating classical counterpoint.
- ›Dynamic extremes: delicate Roland JC-120 clean chorus contrasts with quad-tracked Mesa Boogie Mark IIC+ scooped distortion.
- ›The meter shifts smoothly through 4/4, 3/4, and 2/4 before unleashing the double-time 190 BPM thrash climax.
Fretboard Mechanics
Play the intro clean arpeggios with relaxed alternate picking. In the breakdown, lock the edge of your right-hand palm over the bridge saddles for machine-gun percussive punch.
Use a formal harmonic progression (like i - VI - iv - V) to establish emotional intimacy before tearing it down with extreme tempo and rhythmic disruption.
The foundation for the melancholy clean intro and verse arpeggios.
Source of the raised A# leading tone in the F# major dominant chord.
The natural minor mode providing deep emotional pathos.
Clean arpeggiated minor shapes across the fretboard.
Heavy palm-muted downstroke chords in the chorus and breakdown.
Musical Analysis
🎹 Key & Tonality
⏱️ Song Structure
💡 Understanding B minor:
B minor has a darker, more introspective character. The Dramatic narrative composition moving from haunting Aeolian clean ballad arpeggios to hyper-aggressive thrash metal triplet rhythmic machine-gun warfare mode creates tension and emotion. This key is perfect for expressing melancholy or aggressive themes in rock music.
Foundational scale for the somber opening clean arpeggios and melodic dual leads
High-velocity pentatonic runs and aggressive bends in Kirk Hammett's solos
The harmonic character shaping B minor
Understand minor chord construction and voicings
Primary Chords Used
Scale Patterns in B minor
B Natural Minor (Aeolian)
Notes: B - C# - D - E - F# - G - A
Application: Foundational scale for the somber opening clean arpeggios and melodic dual leads
Interactive Fretboard Map
Chord Progressions & Movement
Main Progression
Somber cyclical arpeggiated progression transitioning into crushing high-gain power chords.
💡 Theory Insight:
This progression creates a specific harmonic movement that defines the song's emotional character. Understanding the relationship between these chords helps in improvisation and songwriting.
Chord Shapes In This Section:
Bm
G
Em
F#
Harmonic Functions & Roles:
- Bm (i)Cold, haunting minor tonic establishing desolation and isolation
- G (VI)Submediant introducing tragic melodic lift and emotional vulnerability
- Em (iv)Minor subdominant leading toward the tension peak
- F# (V)Major dominant borrowed from harmonic minor, providing dark leading-tone resolution
Key Techniques
Machine-Gun Gallop Picking & Two-Hand Tapping
ExpertTight 16th-note sextuplet palm-muted gallop picking locked in unison with the bass drum, coupled with rapid fretboard tapping in the climatic guitar solo
Uses chords:
Progression:
Bm - G - Em - F#
Technique Tips:
- •Use the fleshy edge of your picking palm resting directly over the bridge saddles to keep palm muting ultra-tight and percussive
- •Keep fret-hand fingers anchored on the bass strings to prevent sympathetic vibrations during high-speed tapping
- •Use a stiff, heavy pick (1.0mm - 1.5mm) for zero pick flex during high-velocity gallops
Practice Exercises
Scale and technique exercises in the key of B minor. Switch instrument sounds (Acoustic Steel, Nylon, Clean Electric, Piano) and practice at your own tempo.
Intro Clean Arpeggio Riff
Clean Intro Arpeggio
James Hetfield's haunting opening clean arpeggio played on a Roland JC-120 clean tone with lush stereo chorus
- •B
- •D
- •F#
Machine-Gun Breakdown & Final Solo Riff
Machine Gun Gallop Riff
The quintessential thrash metal rhythmic breakdown locking with double-bass drums, leading into Kirk Hammett's tapped shred solo
- •E
- •F
- •F#
Equipment & Tone Setup
🎸 Guitar
Recommended Model:
Pickup Type:
EMG 60 in neck for pristine clean arpeggios; EMG 81 in bridge for cutting high-gain thrash crunch
⚡ Amplifier & Settings
Recommended Amp:
Tone Stack Dial-In:
Gain: 8.5
Treble: 7.0
Middle: 2.5
Bass: 7.5
Presence: 6.0
🎛️ Effects Pedals
Overdrive / Distortion:
Mesa Boogie Mark IIC+ preamp saturation scooped with graphic 5-band EQ in V-curve
Reverb / Delay:
Subtle studio plate reverb on clean guitars
Modulation / Other:
Dunlop Cry Baby Wah on solos
Recommended Learning Path
Clean Arpeggio Mastery & Rhythm Chords
⏱️ 2-3 weeks
- •Memorize the Bm, G, Em, and F# fingering shapes in the intro
- •Practice alternate picking through the arpeggio pattern at 70 BPM with strict timing
- •Learn the heavy chorus power chords (B5 - G5 - E5 - F#5) with solid downstrokes
Harmonized Twin Leads & Dynamics
⏱️ 3-4 weeks
- •Learn the intro melodic solo over the clean arpeggio progression
- •Master the dynamic shift from ultra-clean chorus to explosive high-gain crunch
- •Practice counting the meter changes (4/4, 2/4, 3/4) before the chorus
Machine Gun Gallops & Blistering Solo
⏱️ 6-8 weeks
- •Build right-hand stamina on the sextuplet palm-muted machine-gun riff at 190 BPM
- •Execute Kirk Hammett's tapping solo cleanly without excess string noise
- •Perform the entire 7-minute epic from start to finish with full physical and rhythmic control
Practice Notes & Routine
⚠️ Common Mistakes to Avoid
- •Tensing the picking arm during the sextuplet machine-gun riff leading to rapid fatigue
- •Failing to mute adjacent strings during the rapid tapping sections of the solo
- •Rushing the tempo during the delicate clean arpeggio intro
⏱️Targeted Practice Routine
0/3 Completed (0%)Check off each segment during your session to track your practice progress:
- 10 minutes: Clean intro arpeggio with metronome at 90-108 BPM
- 15 minutes: Gallop picking endurance drills starting at 140 BPM building to 190 BPM
- 15 minutes: Kirk Hammett solo tapping and scale runs with neck dampener
🎯 Key Focus Areas
- •Right-hand wrist relaxation during high-speed gallops
- •Dynamic contrast between Roland JC-120 cleans and Mesa scooped crunch
- •Meter awareness during transition bars
⏱️ Metronome Drills
- •Start machine-gun gallops at 140 BPM with sixteenth triplets (sextuplets), increasing by 5 BPM daily toward 190 BPM