Lydian Augmented b3 Mode on Guitar: Notes, Chords & Examples

The Lydian Augmented ♭3 mode is a strange, colorful, and highly expressive mode. It sounds like a collision between minor darkness, Lydian brightness, and augmented tension.

If regular Lydian feels dreamy and open, Lydian Augmented ♭3 feels more mysterious and unstable. It has:

• A minor 3rd for a darker emotional center
• A #4 for that floating Lydian sound
• A #5 for augmented, sci-fi tension
• A major 7th for a haunting, cinematic finish

For guitarists, this mode works especially well for progressive rock, metal, fusion, film-score-inspired writing, and modern modal improvisation.

It is not a common pop or classic rock mode. Think of it more as a special color you can use when normal minor, melodic minor, or Lydian dominant sounds too familiar.

How does it sound?

Before anything else, let’s hear how it sounds. This can best be done by playing a chord from the mode, and playing the notes of the mode arpeggiated on top of it. This is the best and quickest way to determine the feel of a mode.

This can be quickly done using SLModes, a software dedicated to the music modes, and the following sound was generated by it:

Formula

The interval formula for C Lydian Augmented ♭3 is:

1 2 ♭3 #4 #5 6 7

In interval names:

• Root
• Major 2nd
• Minor 3rd
• Augmented 4th
• Augmented 5th
• Major 6th
• Major 7th

Compared to C major, the altered notes are:

• Eb instead of E
• F# instead of F
• G# instead of G

That combination is what gives the mode its unusual flavor.

Notes in C

The notes of C Lydian Augmented ♭3 are:

C D Eb F# G# A B

Spelled as scale degrees:

Degree	Note
1	C
2	D
♭3	Eb
#4	F#
#5	G#
6	A
7	B

On guitar, pay close attention to the sound of Eb, F#, G#, and B against a C drone. Those are the notes that really reveal the character of the mode.

The Chord That Defines the Mode

The defining chord of C Lydian Augmented ♭3 is:

Cm(maj7#5)

Notes:

C Eb G# B

This chord captures the core personality of the mode because it contains:

• C — the root
• Eb — the minor 3rd
• G# — the augmented 5th
• B — the major 7th

That gives you a chord that is dark, tense, elegant, and unstable all at once.

To make the chord sound even more like the full mode, add the #11:

Cm(maj7#5#11)

Notes:

C Eb G# B F#

The F# is extremely important because it brings out the Lydian side of the mode. Without it, the chord sounds more like an exotic minor-major augmented chord. With the #11, the modal identity becomes much clearer.

A useful guitar voicing idea:

Cm(maj7#5#11)

E|---2---  F#
B|---0---  B
G|---1---  G#
D|---1---  Eb
A|---3---  C
E|------- 

This is not a beginner-friendly cowboy chord, but it gives you the sound immediately.

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Chord Progression (Example)

Because this is an advanced synthetic mode, chord progressions can feel unusual. The safest way to make the mode clear is to use a C pedal tone or return frequently to Cm(maj7#5).

Roman numerals:

i(maj7#5) – II – i(maj7#5) – vii

Chords in C:

Cm(maj7#5) – D – Cm(maj7#5) – Bm

Mood:

This progression has a floating progressive-rock quality. The D major chord highlights the F# and A, while Bm brings out the major 7 sound against C.

Try playing this with a low C drone or C pedal bass to keep the tonal center grounded.

Guitar Fretboard Shape

Here’s the mode mapped across the full fretboard, generated with my software SLModes.

The diagram shows every occurrence of the mode across the neck:

🟢 Green dots = the root note, your anchor points
🟠 Orange dots = the rest of the scale tones

Why Guitarists Love This Mode

Emotional Flavor

C Lydian Augmented ♭3 sounds dark, bright, tense, and futuristic at the same time.

It does not have the familiar sadness of natural minor or the exotic pull of Phrygian dominant. Instead, it feels more suspended and unresolved.

Good emotional words for this mode:

• Mysterious
• Cinematic
• Unstable
• Elegant
• Alien
• Dark but glowing

Riff Potential

This mode is great for riffs because of its unusual half-step and augmented colors.

Try emphasizing these movements:

C - Eb - F#
1 - ♭3 - #4

That gives you a dark Lydian sound immediately.

Or try:

C - G# - B
1 - #5 - 7

That creates a dramatic augmented-major-7 color.

For metal riffs, you can pedal the low C and move upper notes around it:

C - Eb - C - F# - C - G# - C - B

This creates a tense, modern sound without relying on standard minor scale patterns.

Soloing Applications

For soloing, this mode works best over:

• Cm(maj7#5)
• Cm(maj7#5#11)
• C pedal drones
• D/C
• Bm/C
• F#dim7/C

It is not a scale you casually throw over a normal minor chord. Over a plain Cm chord, the G# and B may sound too tense unless you resolve them carefully.

Instead, use it when the harmony supports the color.

Genres Where It Works Well

C Lydian Augmented ♭3 fits naturally in:

• Progressive rock
• Progressive metal
• Jazz fusion
• Modern instrumental guitar
• Cinematic scoring
• Experimental songwriting
• Dark ambient guitar music
• Technical metal interludes

It is especially useful when you want a sound that feels advanced without becoming random.

Tips for Practicing

Use a C Drone

Start with a simple C drone.

You can use:

• A looper pedal
• A synth pad
• A low C bass note
• An open-tuning drone
• A DAW-generated C note

Then slowly play:

C D Eb F# G# A B C

Listen to how each note feels against C.

Spend extra time on:

• Eb
• F#
• G#
• B

These notes define the mode.

Try Simple Chord Vamps

Use short vamps instead of long progressions.

Good starting points:

Cm(maj7#5) - D

Cm(maj7#5) - Bm

Cm(maj7#5) - F#dim7

Keep the rhythm simple at first. Let your ear adjust to the harmony before making it complex.

Improvise with Small Phrases

Do not run the scale up and down endlessly.

Instead, build short phrases around strong interval shapes:

C - Eb - F#

Eb - F# - G#

G# - B - C

D - F# - A

These small cells are easier to turn into real music.

Target the Important Intervals

When improvising, aim for the color tones intentionally.

Target:

• ♭3 for darkness
• #4 for Lydian brightness
• #5 for augmented tension
• 7 for haunting resolution

A great exercise is to end every phrase on a different color tone.

For example:

• Phrase 1 ends on Eb
• Phrase 2 ends on F#
• Phrase 3 ends on G#
• Phrase 4 ends on B

This helps you learn the emotional weight of each note.

If you like modes, SLModes is for you

SLModes is the software for exploring everything related to music modes.

It helps you experiment with:

• Modal chords
• Guitar fretboard shapes
• Chord progressions
• Modal modulation
• Negative harmony ideas

If you play guitar and want to access 60+ music modes, SLModes is waiting for you

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