Backing tracks for the Key Center of G – Major
G-Major being the root, A-Dorian the 2nd, B-Phrygian the 3rd, C-Lydian the fourth, and D-Mixolydian the fifth.
A Dorian – the second mode of G-Major
B Phrygian – the third mode of G-Major
C Lydian – the fourth mode of G-Major
D Mixolydian Backing Track