Back in Black
by AC/DC
Difficulty Profile
Skill LevelOverall
IntermediateRhythm
IntermediateLead
IntermediateBass
BeginnerWhy "Back in Black" Works Harmonically
Beyond standard guitar tabs and chord charts, discover the exact music theory mechanics, modal interchange, and voice leading choices that give AC/DC's classic its unforgettable emotional power.
The Definitive Arena-Rock Mixolydian Power Cadence (I - ♭VII - IV)
Rather than using a classical leading-tone V chord (B major), AC/DC employs the flat-seventh D chord followed by A major. Moving from D (♭VII) to A (IV) and slamming home to E creates the classic Mixolydian double-plagal cadence—the raw harmonic engine behind hard rock's biggest anthems.
Harmonic Progression (Roman Numerals)
I - ♭VII - IV - IStep-by-Step Movement
- •E5 (I): Heavy low-end open power chord anchoring the key.
- •D5 (♭VII): Flat-seventh chord subverting traditional dominant harmony for raw rock swagger.
- •A5 (IV): Major subdominant acting as the pivotal resolution link back to the tonic.
- •Pentatonic Blues Fill: Angus Young's chromatic pull-off fill puncturing the silence between chord blasts.
Voice Leading & Counterpoint
- ›The root movement descends by whole step (E → D) then jumps up a fourth to A before falling by fourth to E.
- ›Malcolm Young's open position voicings maximize string vibration and sympathetic resonance.
- ›The silent pauses between chord strikes build physical anticipation before the riff hits.
Fretboard Mechanics
Play the chords with heavy downstrokes and zero preamp fizz. The magic is in the volume of the power amp pushing air, allowing the notes to decay naturally into the rests.
Replace your V chord with ♭VII - IV. It instantly strips away academic stiffness and gives your rock progression an unstoppable, street-level swagger.
The scale containing the flat-7th degree (D) used in the progression.
The scale used for Angus Young's biting fill licks.
The primary mode of classic hard rock.
Essential root-fifth shapes for rock rhythm guitar.
The quintessential rock cadence.
Musical Analysis
🎹 Key & Tonality
⏱️ Song Structure
💡 Understanding E major:
E major has a bright, uplifting character typical of major keys. The Ionian (Major) mode gives it a stable, resolved feeling. This key works well for anthemic rock songs and creates a powerful, confident mood.
Primary Chords Used
Scale Patterns in E major
E major scale
Notes: E - F# - G# - A - B - C# - D# - E
Application: Primary harmonic foundation for chord progressions
Interactive Fretboard Map
Chord Progressions & Movement
Main Progression
Classic AC/DC progression using ♭VII chord for rock edge and tension-release
💡 Theory Insight:
These borrowed chords from the parallel minor key add darker, more dramatic colors to the progression. This modal interchange gives rock and metal its signature swagger.
Chord Shapes In This Section:
E5
D5
A5
Harmonic Functions & Roles:
- E5 (I)Establishes strong tonic center in E major
- D5 (♭VII)Borrowed from E minor, creates classic rock character
- A5 (IV)Provides subdominant movement and harmonic contrast
- B5 (V)Creates dominant tension for resolution
Key Techniques
Downstroke Power Chords
IntermediateEssential AC/DC technique using exclusively downstrokes for power chords to achieve the characteristic attack and sustain
Uses chords:
Progression:
E5 - D5 - A5 - E5 (Main Riff)
Technique Tips:
- •Practice slowly to build stamina and consistency
- •Focus on the low E and A strings for power chord foundation
- •Keep unused strings slightly muted to avoid noise
- •Build up speed gradually to maintain clean attack
I-♭VII-IV Progression
BeginnerClassic rock progression using the characteristic ♭VII chord (D major in key of E) that defines the AC/DC sound
Uses chords:
Progression:
I - ♭VII - IV - I in E Major
Technique Tips:
- •Practice chord changes slowly at first
- •Focus on clean transitions between power chords
- •Use minimal finger movement between changes
- •Keep the same picking hand rhythm throughout
Simple Lead Lines
IntermediatePentatonic-based melodic phrases that complement the rhythm guitar without overcomplicating the arrangement
Progression:
Over E5 - A5 verse progression
Technique Tips:
- •Less is more - don't overplay
- •Focus on tone quality over complexity
- •Practice bends to reach exact pitch
- •Listen to original for phrase placement
Practice Exercises
Scale and technique exercises in the key of E major. Switch instrument sounds (Acoustic Steel, Nylon, Clean Electric, Piano) and practice at your own tempo.
Main Riff
Open Position Riff Exercise
Angus and Malcolm Young's signature open-position rock riff featuring crunchy E5, D, and C chords with an iconic pentatonic blues turnaround
- •Smash the open E5 power chord (0.6 2.5 2.4) and let it ring on beat 1
- •Strum three punchy D major chops on strings 2 and 3
- •Follow with three snappy C major chops and Angus's open-string pull-off fill
Verse
Angus & Malcolm Tight Verse Stabs & Fill
Malcolm Young's driving rhythm bed underneath Brian Johnson's vocal, alternating between open E5 and A5
- •Keep rhythm guitar bone-dry and percussive
- •Transition cleanly from low E5 to open A5 (0.5 2.4 2.3)
- •Maintain consistent right-hand attack strength
Bridge
Malcolm Young A-G-D Chord Descent
Descending sequence building massive tension before returning to the unstoppable main riff
- •B5 power chord (2nd fret A string) moves down through A5 to G5
- •Heavy downstrokes with precise muting between changes
- •Creates classic heavy rock tension-and-release cadence
Guitar Solo
Angus Young Iconic E Minor Blues Run
Angus Young's blistering guitar solo, widely ranked among the greatest rock solos of all time, tearing through the 12th-fret E minor pentatonic box
- •Classic 12th-fret E minor pentatonic box across all 6 strings
- •Full 2-octave run covering the core tessitura of Angus's solo
- •Practice clean alternate picking between string changes
Equipment & Tone Setup
🎸 Guitar
Recommended Model:
Pickup Type:
Humbuckers for thick, sustained power chord tone
Alternative Models:
⚡ Amplifier & Settings
Recommended Amp:
Tone Stack Dial-In:
Gain: 7-8 (natural tube overdrive)
Treble: 7 (bright, cutting tone)
Middle: 6-7 (present mids for power chords)
Bass: 4-5 (tight low end)
Presence: 8 (cut through mix)
🎛️ Effects Pedals
Overdrive / Distortion:
None - natural amp overdrive only
Reverb / Delay:
Natural amp reverb
Modulation / Other:
No effects pedals - pure guitar and amp tone
Recommended Learning Path
⏱️ 2-4 weeks with regular practice
- •Master E5, A5, and D5 power chord shapes
- •Practice downstroke technique slowly
- •Learn the main riff chord progression
- •Work on clean chord transitions
⏱️ 4-6 weeks for solid performance
- •Build stamina for consistent downstrokes
- •Practice at full tempo (93 BPM)
- •Add bridge section power chords
- •Work on dynamic control between sections
⏱️ 6-8 weeks for complete mastery
- •Learn simple lead guitar phrases
- •Master whole-step bending technique
- •Achieve authentic amp tone settings
- •Combine rhythm and lead playing
Practice Notes & Routine
⚠️ Common Mistakes to Avoid
- •Using upstrokes instead of consistent downstrokes
- •Over-palm muting the power chords
- •Playing too fast initially without building stamina
- •Not maintaining consistent attack strength
⏱️ Targeted Practice Routine
- •Warm up with simple E5 downstrokes for 5 minutes
- •Practice chord changes slowly: E5-D5-A5-E5
- •Build tempo gradually from 60 BPM to 93 BPM
- •Work on stamina with extended downstroke practice
🎯 Key Focus Areas
- •Downstroke consistency and power
- •Clean power chord voicings
- •Rhythm precision and timing
- •Stamina building for sustained downstrokes
⏱️ Metronome Drills
- •Start at 60 BPM with simple downstrokes
- •Gradually increase to 93 BPM (song tempo)
- •Practice chord changes with metronome
- •Work on maintaining consistent timing throughout song