Basics of Lydian (IV) mode on the Guitar

Lydian is the fourth mode of the major scale on the guitar — when the 4th scale degree functions as the tonic. Because it centers on a major chord, it’s considered a major key. Rarely do you hear a song that’s completely in Lydian mode. Instead, this mode usually occurs only temporarily in a song, until the music moves to a more stable tonic like I.

Here you see what happens to the G major scale when you reorganize its notes and chords, beginning with the 4th degree, C, to produce C Lydian mode:

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

The most defining characteristic of Lydian mode is its sharpened 4th, which is why many musicians think of it as a major scale with a sharpened 4th. Here you see C Lydian taken from its parent major scale, G.

Credit: Illustration courtesy of Desi Serna

You can play C Lydian anywhere on the fretboard as long as you use notes and chords from the G major scale and center on C. You can also move the pattern around the fretboard to play Lydian mode in other keys.

Here is a new major scale pattern that begins on the 5th string. Here, the parent major scale is C and the mode is F Lydian. Again, this is just a starting point. You find the same notes and chords elsewhere on the fretboard, and you can move this pattern around to play in other keys.

Credit: Illustration courtesy of Desi Serna

Here are a few sample chord progressions and songs based on the 4th degree of the major scale:

“Dreams” by Fleetwood Mac

Fmaj7-G6

I-II in F Lydian (IV-V in the C major scale)

“Just Remember I Love You” by Firefall

Fmaj7-G6

I-II in F Lydian (IV-V in the C major scale)

“Jane Says” by Jane’s Addiction

G-A

I-II in G Lydian (IV-V in the D major scale)

“Here Comes my Girl” by Tom Petty

A-B

I-II in A Lydian (IV-V in the E major scale)

“Man on the Moon” by R.E.M.

C-D

I-II in C Lydian (IV-V in the G major scale)

“Hey Jealousy” by Gin Blossoms

D-E-Fsm-E

I-II-iii-II in D Lydian (IV-V-vi-V in the A major scale)

“Space Oddity” by David Bowie

Fmaj7-Em

I-vii in F Lydian (IV-iii in the C major scale)