Do Classic Rock Loop

I – ♭VII – IV progression in Do major

Chords
Triads7th Chords
Harmony
Originalii–V–ISec. Dom.
IDo
♭VIISi♭
IVFa

Triad Diagrams — Do Classic Rock Loop (Guitar)

Do Classic Rock LoopI – ♭VII – IV

The C Classic Rock Loop (C – Bb – F) draws its rebellious energy from the borrowed ♭VII chord — a hallmark of Mixolydian mode. Mixolydian Pentatonic outlines the riff cleanly; Minor Blues adds the grit that has powered this three-chord formula since the 1960s. Major Blues works as a brighter alternative for country-rock phrasing. With seventh chords (CMaj7 – Bb7 – FMaj7), the soulful, bluesier character takes over.

Playing in Do major

With no sharps or flats, C major is the theoretical home base on guitar. The open G, B, and high E strings all belong to the C major chord, creating natural sustain. C is a beginner-level key on guitar because the open B and high E strings ring within the scale, and every basic chord uses familiar open shapes. Beginners will find this key approachable since most chords use open voicings with minimal stretching.

Voice Leading

The bass line moves through C to Bb (descending whole step), Bb to F (descending perfect fourth). The mix of stepwise and leap motion balances smoothness with harmonic drive. When the progression loops, the bass returns from F to C by perfect fourth.

Capo Transposition

To play in C using familiar open chords: capo 3 with open A shapes; capo 5 with open G shapes. Choose the capo position that gives you the voicings you prefer — lower capo positions produce a fuller sound, while higher positions create a brighter, mandolin-like timbre.

Scales for Soloing

C major pentatonic works because every note is either a chord tone or a safe passing tone — there are no avoid notes. For soloing, this means you can play freely without clashing. Over dominant seventh chords, C Mixolydian adds the flat seventh for an authentic blues-rock edge.

Strumming Pattern

Drive with all downstrokes at 140+ BPM for raw punk energy, or use D-D-DU-UDU for classic rock. Palm mute the verse and open up the strumming on the chorus for dynamic contrast.

Pop / RockEnergy & Drive4/4 · 4 bars

Chords (triads): Do, Si♭, Fa.

Chords (7th): DoMaj7, Si♭7, FaMaj7.

Famous songs using this progression

  • Gloria – Them (Van Morrison)
  • More Than A Feeling – Boston
  • La Grange – ZZ Top
  • Sweet Home Chicago – Traditional