I–V6–vi–IV: Voice-Leading Loop

C–G/B–Am–F is a voice-leading trick that makes a simple progression sound arranged. Putting G over B turns the bass into a stepwise line (C–B–A), so the harmony feels like it is flowing rather than jumping. Functionally, you still have tonic stability, dominant energy, a relative-minor color, and the warm openness of IV, which is why it works for singer-songwriter verses, worship progressions, and fingerpicking guitar patterns. The smoothness also helps melodies: you can hold E across C and Am, or hold C across G/B and Am, and the chord change still feels active because the bass is moving. For piano, play light right-hand triads and let the left hand carry the bass steps. For writing, try delaying the F chord by half a bar; that tiny rhythmic surprise often turns into the hook of the section.

Key
C major
Tempo
106 BPM
Groove
rock

Play it on guitar

Start slow, keep your right hand steady, and aim for clean changes on the downbeats. Once it’s comfortable, add a groove and increase tempo.

Capo suggestion: try capo 0 and play in C shapes for open chords.

Chords: C – G/B – Am – F

Roman numerals & theory

Roman numerals describe the chord’s function relative to the key. This helps you transpose the “shape” to any key without memorizing new chord names.

In C major: I–V–vi–IV

Variations (keep the progression, change the feel)

  • Add 7ths for color (try maj7 on I, m7 on vi, and V7 before resolving).
  • Use a sus4 resolve on the V chord (e.g. Gsus4 → G) to create tension and release.
  • Change the rhythm instead of the chords: try anticipations (hit the next chord on the “and” of 4).
  • Arpeggiate the top notes to create a hook while the harmony stays the same.
  • Borrow a darker chord for contrast (in a major key, try iv for one bar before returning).

Related

FAQ

What chords are in I–V6–vi–IV: Voice-Leading Loop?
In C major, a common spelling is: C – G/B – Am – F. Use the “Open in Builder” button to hear it with a groove and adjust tempo.
What key is this progression in?
This page’s example is in C major. You can transpose the idea to other keys (often with a capo) while keeping the same progression shape.
How do I play this progression on guitar?
Start with clean chord changes at a slow BPM. For open chords, try capo 0 and play in C shapes, then increase tempo once the groove feels steady.
How can I make it sound more interesting?
Keep the progression but add movement: sus4 resolves, 7ths, or a stronger V7 before returning to I. Rhythm and dynamics usually create the biggest “upgrade” on guitar.
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Your Progression

Select a chord below to start building your progression

Drums: 75%
Humanize
Sustain: 95%
BPM: 120
Bar /
Key: C major
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