G mixolydian chordson the mandolin
Main chords: G (I), F (♭VII), C (IV)
The scale: G A B C D E F
Drones: Open G and D ring in G mixolydian; A and E fit the key too. The courses are G D A E, low to high.
Common progressions
- I – ♭VII – I: G – F – G
- I – IV – I – ♭VII: G – C – G – F (reels in D or A mix)
- I – ♭VII – IV – I: G – F – C – G (down and back home)
Basis: DADGAD Guitar blog (2009) and common session practice: the flat 7th's major chord (C in D mix) answers the tonic.