The Beatles · Revolver

Tomorrow Never Knows

3 min readLast updated November 2026 Sign in to track progress
Table of contents

Dynamics

  • Variable, unpredictable dynamics — engineers independently fade individual tape loops in and out in real time; no conventional written dynamic markings
  • Fade in / fade out structure — no hard attack or release; reinforces the dreamlike, consciousness-dissolving aesthetic

Rhythm / Tempo / Metre

  • 4/4 throughout; moderate-fast tempo (♩ = 126 bpm)
  • Contrast between vocal and accompaniment layers: lead vocal has a relatively steady, moderate delivery; tape loops create feverish, fragmented rhythmic activity around it
  • Rhythmic devices in the tape loops and accompaniment:
    • Syncopation — push rhythms in bass riff and tape loops
    • Triplet crotchets and triplet quavers (guitar solo loop)
    • Dotted rhythms and Scotch snaps (backward guitar loop)
    • Crotchet triplets creating forward and backward metric displacement
    • Cross-rhythms across simultaneous layers

Texture

  • Overall melody-dominated homophony — solo lead vocal over a persistent C tonic drone
  • Tape loops introduce electronic polyphony: multiple simultaneous independent lines create a layered, complex web of sound
  • Homophonic moment (bar 11): B♭ and C chords create a brief block-chord texture within the polyphonic surface
  • Textural layers:
    • Solo voice
    • Persistent C tonic pedal (drone)
    • Bass guitar riff
    • Multiple aleatoric tape loops (independent, layered)
  • Sitar and tambura sonorities hint at Eastern drone-based meditation texture — reinforces the modal, static harmonic world

Structure

  • Strophic form — melody and harmonic material repeat for each verse; no contrasting chorus
    • Wider listening: cf. Bob Dylan ('Blowin' in the Wind', 'The Times They Are A-Changin') — strophic form typical of folk-influenced art songs
  • No conventional introductionfade in replaces a formal intro
  • Outline:
    • Faded-in introduction
    • 3 verses (8 bars each)
    • Instrumental (16 bars)
    • 4 further verses (8 bars each)
    • Coda — focused on repetitions of the final bars of the verse
    • Outro — fades out

Melody

  • Bars 6–9 (verse opening): outlines the tonic broken chord of C — direct, chant-like effect
  • Bars 10–14: moves between C major and C Mixolydian — alternation of E and E♭ introduces pentatonic / blues scale inflections and pitch bends
  • Final two phrases: move from the 5th degree up to the flattened 7th (B♭), then resolve to the tonic — archetypal Mixolydian contour
  • Flattened 3rd (E♭, bar 23) — additional blues colour
  • Same melody repeated throughout each verse — chant-like, hypnotic; reinforces the "monk chanting" aesthetic
  • Tape-loop melodic material: wider in range and more random — contrasts with the regularity of the vocal line

Instrumentation / Sonority

  • Lead vocal (John Lennon):
    • Opening verses: automatic double tracking (ADT)
    • Post-instrumental verses: routed through a revolving Leslie speaker — produces swirling, otherworldly timbre; evokes Tibetan chanting
  • Tape loops — the defining sonic feature:
    • 30 tape loops recorded; 16 selectedsound collage / musique concrète
    • 8 tape decks operated independently by engineers, each choosing when to play their loop — aleatoric process
    • Loop content:
      • "Seagull" sound effect — McCartney laughing, sped up via varispeeding
      • Orchestral chord of B♭ major
      • Electric guitar phrase, reversed and played at double speed (backmasking)
      • Sitar-like sound, reversed, multitracked, and varispeeded
  • Tack piano (thumb tacks placed on piano hammers) — a form of prepared piano; adds percussive, brittle timbre
  • Sitar and tambura — Eastern instrumentation; contributes to the drone-based, meditative texture
  • Backmasking / varispeeding creates a chaotic, frenzied sonic atmosphere

Tonality

  • C major throughout, with a strong Mixolydian modal inflection
  • Prominent flattened 7th (B♭) — the defining modal characteristic; recurs melodically and harmonically
  • Alternation between C major and C Mixolydian — no modulation; tonality remains static

Harmony

  • Extremely static harmony — almost no functional chord progressions
  • Harmonic material reduced to:
    • Persistent C tonic drone (throughout)
    • Oscillation between B♭ → C — the two chords of C Mixolydian
  • No conventional cadences — dominant function entirely absent
  • Indian classical influence: sustained tonic drone mirrors the harmonic world of raga-based music
  • Tape-loop B♭ chord appears as an aleatoric harmonic event rather than a functional progression