Article / Updated 07-22-2022
On the guitar, Lydian is the fourth mode of the major scale, and the sound that’s created when the 4th scale degree functions as the tonic. Because it features a major 3rd and centers on a major chord, it’s considered a major mode.
Drawing from the G major scale, Lydian mode looks like this:
G major
1-2-3-4-5-6-7
G-A-B-C-D-E-Fs
I-ii-iii-IV-V-vi-viif5
G-Am-Bm-C-D-Em-Fsmf5
C Lydian
1-2-3-s4-5-6-7
C-D-E-Fs-G-A-B
I-II-iii-sivf5-V-vi-vii
C-D-Em-Fsmf5-G-Am-Bm
Lydian can be thought of as a major scale with a raised 4th, it’s most defining characteristic.