GDAD tuning. Run through of chord forms and use of maj and dom 7ths. Better quality audio on end to show the chords, (chords displayed in order but not in sync or all chords listed etc)
Playing a Greek Bouzouki for years O used G C E A, A D F #B, and A D F C ,a varient of G D A D .Old Chris a retired fiddler of Albuquerque NM ( tune fiddle D A E B)