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

  • May 21, 2026

The Lydian Augmented b3 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 b3 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.

Formula

The interval formula for C Lydian Augmented b3 is:

1 2 b3 #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 b3 are:

C D Eb F# G# A B

Spelled as scale degrees:

DegreeNote
1C
2D
b3Eb
#4F#
#5G#
6A
7B

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 b3 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.

Chord Progressions

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).

Progression 1

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.

Progression 2

Roman numerals:

i(maj7#5) – #iv°7 – II7 – i(maj7#5)

Chords in C:

Cm(maj7#5) – F#dim7 – D7 – Cm(maj7#5)

Mood:

This is tense, angular, and fusion-friendly.

The F#dim7 chord strongly emphasizes the #4. The D7 chord gives you a bright dominant color, but because the tonal center is still C, it does not function like a normal V chord.

This one works well for odd-meter riffs or clean arpeggiated sections.

Progression 3

Roman numerals:

i(maj7#5) – vi° – vii – II

Chords in C:

Cm(maj7#5) – A° – Bm – D

Mood:

This progression has a dark rising motion. It works well for progressive metal, cinematic rock, or fusion writing.

The movement from A° to Bm to D feels like it is climbing upward, but the return to Cm(maj7#5) pulls everything back into a strange, unstable center.

For a heavier sound, try turning the chords into power-chord-style fragments and let the lead guitar imply the full mode.

Famous Songs and Guitarists Using C Lydian Augmented b3

There are no widely known guitar songs that are clearly and consistently written in C Lydian Augmented b3.

This is an obscure mode, so it is better not to force fake examples.

That said, the sound is related to musical colors commonly associated with:

  • Modern jazz-fusion
  • Progressive metal
  • Cinematic rock
  • Advanced modal improvisation
  • Allan Holdsworth-inspired harmony
  • Shawn Lane-style outside lines
  • Modern film-score harmony

Guitarists who explore Lydian, augmented, melodic minor, harmonic major, and synthetic scale sounds may touch on similar colors, but specific use of Lydian Augmented b3 is not commonly documented in famous songs.

A practical way to think about it:

  • If you like Lydian but want it darker, try this mode.
  • If you like melodic minor but want more bite, try this mode.
  • If you write progressive riffs and want something less predictable than Phrygian or harmonic minor, this mode is worth exploring.

Guitar Fretboard Shape

Here is a practical 6-string shape for C Lydian Augmented b3:

C Lydian Augmented b3
Notes: C D Eb F# G# A B

E|--------------------------10-11-14-|
B|------------------10-12-13---------|
G|-----------8-11-13-----------------|
D|------9-10-12----------------------|
A|-9-11-12---------------------------|
E|-8-10-11---------------------------|

This shape starts on C at the 8th fret of the low E string.

Because the mode contains both a #4 and #5, some fingerings feel wider than standard major or minor scale shapes. Practice slowly and listen carefully to each interval.

Important target notes:

  • Eb — gives the mode its minor color
  • F# — gives the Lydian lift
  • G# — creates augmented tension
  • B — adds the haunting major 7 sound

Why Guitarists Love This Mode

Emotional Flavor

C Lydian Augmented b3 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 - b3 - #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 b3 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:

  • b3 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.

Try This Mode in SLModes

Want to explore C Lydian Augmented b3 more deeply?

Try it in SLModes.

SLModes helps you experiment with:

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

For a mode this unusual, visual tools are extremely helpful. You can hear the sound, see the fretboard, test chords, and discover ways to move between related modes without getting lost in theory.

Load up C Lydian Augmented b3 in SLModes and start with a C drone, a Cm(maj7#5) chord, and the fretboard shape above. Then let your ear guide you.