The Folk Chord Progression
The Modal Folk Vamp uses i-bVII-IV. In A Dorian, play Am-G-D. The D major chord contains F-sharp, the raised sixth that distinguishes Dorian from A natural minor.
- 3 chords
- Am G D
- F-sharp defines A Dorian
same family
The progression
- i
- bVII
- IV
Find the defining note
| Version | Third chord | Sixth above A | Mode |
|---|---|---|---|
| Am-G-D | D F-sharp A | F-sharp | A Dorian |
| Am-G-Dm | D F A | F | A natural minor |
Only one note changes between D and Dm, but that note identifies the modal collection. Put F-sharp in the melody as D arrives so the listener can hear the difference clearly.
Keep A as the centre
The same notes as A Dorian also belong to G major. Chord content alone cannot tell the ear which note is home. Use an A drone, return often to Am and let important melodic phrases settle on A or E.
G major then functions as flat VII around A, while D major supplies the Dorian IV. A strong G-C-D-G cadence would pull attention toward G major, so avoid it when A should remain central.
Why the loop keeps moving
The progression contains no E major or E7 dominant. G natural sits a whole tone below A, so there is no G-sharp leading tone pushing into the tonic.
Am still feels more stable because of repetition, metric placement and melody. The loop has a centre without needing a dominant cadence.
Try it in four passes
- Drone Ahold the tonic under all three chords.
- Follow F-sharpsing it over D and return to G or E over Am.
- Lower it to Fhear the loop become natural minor.
- Remove the dronenotice whether G begins to compete as the tonal centre.
Make it yours
- Use open strings
A and E can ring through the loop on guitar or strings, reinforcing the centre.
- Add sevenths carefully
Am7-Gmaj7-D7 keeps the same modal notes, although D7 gives the IV chord a stronger colour.
- Write around 6-5
Let F-sharp fall to E when D returns to Am; the modal note becomes part of the melody.
When it is useful
Use this vamp when you want a minor tonic with a brighter sixth and little dominant pressure. It suits folk, modal jazz, rock and repeating vocal sections.