What are the modes? The modes are 7 Greek named scales based from of the major scale.
They are built using each note of the major scale 1,2,3,4,5,6,7
EXAMPLE in the key of G Major: G, A, B, C, D, E, F#
G Ionian, A Dorian, B Phrygian, C Lydian, D Mixolydian, E Aeolian, F# Locrian.