The vi IV I V Progression

Axis Rotation uses vi-IV-I-V. In C major that is Am, F, C and G: the same cyclic order as the Axis Progression, with the bar line moved so the minor chord begins the phrase.

4 chords
vi IV I V
Am F C G in C

same family

Compare the two loopsvi - IV - I - V

The progression

Follow the arrows once, then use the player below to hear the loop.

What rotation means

Write the Axis Progression in a circle:

C - G - Am - F - C - G - Am - F

You can place the beginning of a four-chord phrase at any point on that circle. Starting at Am gives:

Am - F - C - G

No chord has been replaced, and the order around the circle remains the same. What changes is the chord that receives the strongest phrase accent.

What you are likely to hear

Am arrives first
The minor chord gets the opening emphasis, so the loop can feel more reflective from its first beat.
C appears in the middle
The major tonic still provides stability, but it no longer defines the opening.
G closes the unit
Ending the four-chord group on V creates a clear push into the next Am. Because that destination is vi rather than I, the restart avoids a full dominant-to-tonic cadence.

Does the key become A minor?

Not automatically. C major and A minor use the same seven notes and these four chords can belong to either key. Context decides which centre the listener hears.

Evidence for C major includes melodies that settle on C, prominent G-to-C motion elsewhere, and longer phrases that end on C. Evidence for A minor includes melodies that settle on A and a stronger minor-key dominant such as E or E7 leading to Am.

The first chord influences emphasis, but it does not determine the key by itself.

Compare the phrase roles

Position	I-V-vi-IV	vi-IV-I-V
First chord	C: major tonic	Am: relative minor
Middle turn	G to Am	F to C
Last chord	F: open return	G: active lead-in
Restart	F to C	G to Am

Play both versions without a melody first. Then add a melody ending on C and repeat with one ending on A. The melody helps tell the ear which note deserves to feel central.

Try all four rotations

I-V-vi-IV - a clear major opening and an open IV ending
V-vi-IV-I - tension begins the phrase and I closes it
vi-IV-I-V - minor colour first and dominant energy last
IV-I-V-vi - a softer opening followed by a deceptive ending

Each version contains the same harmonic cycle. Each assigns different moments to the downbeat, midpoint and final bar.

Make it yours

Move the bar line
Keep playing the same cycle while counting four bars from a different chord. This is the quickest way to hear rotation.
Write a new first note
Place A or C on the first strong beat and notice how the melody supports a minor or major reading.
Create a real cadence later
Use the loop for the verse, then add E7-Am or G-C at the end of a larger section to confirm the key.

When it is useful

Rotate a loop when its chords are right but its phrase shape is wrong. The technique changes emphasis without forcing you to find new harmony, which makes it useful during arrangement and songwriting.

Keep going

Everything in chord progressions

Open chord progressions