C♯ Lydian

Dreamy, floating, ethereal — built from G♯ major

PARENT FAMILY · G♯ MAJ

All 7 modes share the same parent scale (G♯ major). C♯ Lydian is the IV mode.

#	Mode	Diatonic chords	Mood
I	G♯ Ionian	G♯maj7 – A♯m7 – Cm7 – C♯maj7 – D♯7 – Fm7 – Gm7♭5	Happy, bright, resolved
II	A♯ Dorian	A♯m7 – Cm7 – C♯maj7 – D♯7 – Fm7 – Gm7♭5 – G♯maj7	Soulful, minor but with hope
III	C Phrygian	Cm7 – C♯maj7 – D♯7 – Fm7 – Gm7♭5 – G♯maj7 – A♯m7	Dark, tense, Spanish/flamenco
IV	C♯ Lydian	C♯maj7 – D♯7 – Fm7 – Gm7♭5 – G♯maj7 – A♯m7 – Cm7	Dreamy, floating, ethereal
V	D♯ Mixolydian	D♯7 – Fm7 – Gm7♭5 – G♯maj7 – A♯m7 – Cm7 – C♯maj7	Bluesy, dominant, rock
VI	F Aeolian	Fm7 – Gm7♭5 – A♭maj7 – B♭m7 – Cm7 – D♭maj7 – E♭7	Melancholic, natural minor
VII	G Locrian	Gm7♭5 – G♯maj7 – A♯m7 – Cm7 – C♯maj7 – D♯7 – Fm7	Unstable, tense, dissonant

SCALE · 7 NOTES · 1 2 3 ♯4 5 6 7

C♯ D♯ F G G♯ A♯ C

Formula: 1 2 3 ♯4 5 6 7

The Lydian scale on C♯ contains the notes C♯, D♯, F, G, G♯, A♯, C. The pentatonic subset is C♯, D♯, F, G♯, A♯.

Characteristic note: the ♯4 (raised fourth) gives it a dreamy, floating quality.

DIATONIC 7ths · CHORD PAD

I

C♯maj7

II

D♯7

III

Fm7

IV

Gm7♭5

V

G♯maj7

VI

A♯m7

VII

Cm7

▸ Play C♯ Lydian over C♯maj7 and D♯7 progressions.

FRETBOARD · STANDARD TUNING · 15F● LIVE

CHARACTER · DREAMY, FLOATING, ETHEREAL

DREAMY, FLOATING, ETHEREAL

C♯ Lydian is a major mode with a dreamy, floating, ethereal character. It is the IV mode of G♯ major — it uses the same 7 notes as G♯ Ionian but is rooted on C♯, which shifts the harmonic focus and creates a completely different sound. The tonic chord is C♯maj7.

Where to use C♯ Lydian

Film music, jazz, progressive rock.

Famous examples

The Simpsons theme
Flying (Beatles)
Lydian film scores

What makes it distinctive: the ♯4 (raised fourth) gives it a dreamy, floating quality.

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