Gb Lydian (F# Lydian) on Guitar

Lydian is the major scale with the 4th raised a semitone — major, but floating instead of grounded. The notes of Gb Lydian are Gb, Ab, Bb, C, Db, Eb, F. Its characteristic note is C — the sharp 4th — the one note that gives this major-type scale its colour.

It is the dreamy, weightless sound of film scores, "The Simpsons" theme, and Joe Satriani ballads ("Flying in a Blue Dream" is a Lydian tutorial with a record deal). The sharp 4th refuses to resolve downward the way a normal 4th does, so the whole scale hovers.

Gb Lydian across the whole neck

Standard tuning, frets 0–12. The gold notes are the root (Gb); every colour marks an interval, the same palette the app uses.

Practice Gb Lydian over a drone →Free, in your browser. It listens through your mic and lights up what you play.

Over the drone, hold the sharp 4th and let it ring — in any other major context it would be a wrong note; here it is the point.

Formula and intervals

R - 2 - 3 - b5 - 5 - 6 - 7 — 7 notes. The natural 3rd makes it a major-family scale.

Chords in Gb Lydian

These are the diatonic chords — the harmony built from only the notes above. Vamping between any of them keeps you inside the mode.

Degree	Chord	Quality
I	Gb	Major
II	Ab	Major
iii	Bbm	Minor
iv°	Cdim	Diminished
V	Db	Major
vi	Ebm	Minor
vii	Fm	Minor

Same notes, different home

Gb Lydian contains exactly the same notes as Db Major. Nothing about the notes changes — what changes is which one feels like home, and that changes everything about the sound.

Other modes on Gb