Ionian #2 Mode on Guitar: Notes, Chords & Examples

  • May 21, 2026

Ionian #2 is a bright major mode with a strange, futuristic twist.

At first, it feels close to the regular major scale because it has a major 3rd, perfect 5th, major 6th, and major 7th. But the raised 2nd gives it a sharp, exotic color that immediately separates it from normal Ionian.

Instead of the smooth sound of:

C D E F G A B

C Ionian #2 gives you:

C D# E F G A B

That D# creates a tense half-step pull into E, the major 3rd. The result is a mode that sounds:

  • Major, but unstable
  • Bright, but mysterious
  • Exotic, synthetic, and slightly “wrong” in a cool way
  • Great for fusion, progressive rock/metal, film-style harmony, and experimental songwriting

Think of it as a major scale that has been bent toward something more dramatic and surreal.

Formula

The interval formula for Ionian #2 is:

1 #2 3 4 5 6 7

In interval names:

P1 A2 M3 P4 P5 M6 M7

Compared to regular Ionian, only one note changes:

Ionian:     1  2  3  4  5  6  7
Ionian #2:  1 #2  3  4  5  6  7

That one altered note makes a huge difference.

Notes in C

C Ionian #2 contains the notes:

C D# E F G A B

It is important to spell the second note as D#, not Eb.

Why?

Because this mode has both D# and E. The D# functions as a raised 2nd, or #9, leading into the major 3rd, E.

If you call it Eb, it starts to look like a minor 3rd, which misrepresents the sound of the mode. C Ionian #2 is still fundamentally a major mode.

The Chord That Defines the Mode

The chord that best captures the sound of C Ionian #2 is:

Cmaj7(#9)

Chord tones:

C E G B D#

This chord works because it includes the stable major sound of Cmaj7:

C E G B

But it also adds the signature note:

D# = #9

That #9 is the emotional center of the mode. It creates a spicy clash against the major 3rd, E, while still keeping the overall harmony bright and major.

A useful guitar voicing:

Cmaj7(#9)

E|--x--
B|--4--  D#
G|--4--  B
D|--2--  E
A|--3--  C
E|--x--

Or a wider, more modern voicing:

Cmaj7(#9)

E|--11-- D#
B|--8--- G
G|--9--- E
D|--9--- B
A|--x---
E|--8--- C

This is not a soft, traditional major chord. It has bite. It sounds modern, tense, and cinematic.

Chord Progressions

Because Ionian #2 is an advanced synthetic mode, not every diatonic chord sounds equally familiar. The strongest progressions are usually built around the tonic chord and the mode’s most colorful available chords.

Here are three practical C Ionian #2 progressions for guitar.

Progression 1

Imaj7(#9) - IVmaj7 - V7#5 - Imaj7(#9)

In C:

Cmaj7(#9) - Fmaj7 - G7#5 - Cmaj7(#9)

This progression has a bright but dramatic sound.

The Fmaj7 gives a smooth, open release. The G7#5 adds tension because the note D# functions as the augmented 5th of G. When it resolves back to Cmaj7(#9), the progression feels familiar and strange at the same time.

Mood:

  • Cinematic
  • Progressive
  • Bright but uneasy
  • Great for clean arpeggios or layered guitar parts

Progression 2

Imaj7(#9) - vi7 - IVmaj7 - V7#5

In C:

Cmaj7(#9) - Am7 - Fmaj7 - G7#5

This is like a classic major-key songwriter progression, but with a synthetic twist.

The Am7 and Fmaj7 are warm and accessible. The Cmaj7(#9) and G7#5 make the progression feel more modern and unusual.

Mood:

  • Emotional but not sad
  • Dreamy
  • Good for progressive pop, fusion ballads, or ambient rock
  • Works well with delay-heavy clean guitar

Try letting open strings ring where possible, or arpeggiating each chord slowly.

Progression 3

Imaj7(#9) - iii(maj7) - vi7 - IVmaj7

In C:

Cmaj7(#9) - Em(maj7) - Am7 - Fmaj7

The Em(maj7) chord is especially interesting because it uses:

E G B D#

That D# is the major 7th of Em, but it is also the #2 of C. This makes the progression sound moody, fusion-like, and slightly noir.

Mood:

  • Darker than the first two progressions
  • Sophisticated
  • Fusion-friendly
  • Great for legato soloing and expressive bends

For extra modal focus, keep a C pedal tone underneath the whole progression.

Famous Songs and Guitarists Using C Ionian #2

C Ionian #2 is not a common “songwriting mode” like Dorian, Mixolydian, or Aeolian.

There are not many famous guitar songs that are clearly and consistently written in Ionian #2. It is better to be honest about that than to force questionable examples.

You are more likely to hear this sound used as:

  • A temporary color over a major chord
  • A Cmaj7(#9) or major #9 sonority
  • A synthetic scale choice in fusion or progressive music
  • A film/game composition color
  • A modal modulation effect

Guitarists and composers commonly associated with synthetic scales, advanced modal colors, and unusual major/minor tension include:

  • Allan Holdsworth
  • Steve Vai
  • Joe Satriani
  • John McLaughlin
  • Progressive metal and fusion players in general

However, specific claims that a well-known song is “in Ionian #2” should be treated cautiously unless the harmony and melody strongly support that analysis.

A useful comparison: the famous “Hendrix chord” sound uses a dominant #9 chord, such as E7#9. That is not the same as Ionian #2, because Ionian #2 is based on a major 7 sound, not a dominant 7 sound. But both share that spicy major-third-plus-#9 tension.

Guitar Fretboard Shape

Here is a practical C Ionian #2 shape starting from the 8th fret on the low E string.

Notes:

C D# E F G A B

Tab shape:

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

Root notes, C, appear at:

Low E string: 8th fret
D string:    10th fret
B string:    13th fret

Practice the shape slowly. The stretch between C and D# on the low E string is part of the sound. Do not smooth it out into normal major-scale phrasing too quickly.

Why Guitarists Love This Mode

C Ionian #2 is exciting because it gives you a major sound that does not feel predictable.

Emotional Flavor

The mode has a bright center, but the #2 adds tension immediately.

That gives you a sound that can feel:

  • Futuristic
  • Exotic
  • Unstable
  • Heroic but strange
  • Beautiful in an uneasy way

It works especially well when you want something major, but not cheerful or ordinary.

Riff Potential

For riffs, the most important move is:

C - D# - E

That chromatic-like squeeze into the major 3rd gives the mode its identity.

Try riffing with:

C D# E F
C D# E G
C B A G F E D# C

On distorted guitar, pedal the low C and move the upper notes around it.

Example idea:

E|----------------|
B|----------------|
G|----------------|
D|----------------|
A|------6-7-------|
E|--8-8-----8-7---|

That D# to E movement creates instant tension.

Soloing Applications

C Ionian #2 works well over:

  • Cmaj7(#9)
  • Cmaj7(add#9)
  • Cmaj13(#9)
  • C pedal tones
  • Modal fusion vamps
  • Progressive rock sections with static harmony

When soloing, do not just run the scale up and down. Target the D# and resolve it into E. That is where the magic is.

Genres Where It Works Well

C Ionian #2 can fit into:

  • Progressive rock
  • Progressive metal
  • Jazz fusion
  • Modern instrumental guitar
  • Film and game music
  • Experimental songwriting
  • Ambient guitar music
  • Math rock and post-rock textures

It is especially powerful when layered with clean chords, synth pads, or heavy low-string pedal riffs.

Tips for Practicing

Use a C Drone

Start with a simple C drone.

You can use:

  • A looper pedal
  • A synth pad
  • A bass note
  • A clean guitar C power chord
  • A DAW drone track

Then play the scale slowly:

C D# E F G A B C

Listen closely to how each note feels against the C.

Spend extra time on:

D# resolving to E
B resolving to C
F resolving to E
A resolving to G or B

Try Simple Chord Vamps

Use short vamps instead of long progressions.

Good starting points:

Cmaj7(#9) - Fmaj7
Cmaj7(#9) - G7#5
Cmaj7(#9) - Am7 - Fmaj7

Keep the harmony simple so the mode stays clear.

Improvise with Motifs

Do not begin by shredding the full scale.

Instead, create short phrases using the defining notes:

C D# E
B C D# E
G A B C
F E D# C

Repeat them rhythmically. Move them across strings. Try them with slides, bends, and legato.

Target the Important Intervals

The most important tones are:

  • 1 / C: tonal center
  • #2 / D#: signature tension
  • 3 / E: confirms the major quality
  • 7 / B: adds major 7 brightness
  • 4 / F: creates a tight half-step above E

A strong practice goal is to make the D# sound intentional. If you land on it randomly, it may sound like a wrong note. If you lean into it and resolve it musically, it becomes the identity of the mode.

Try This Mode in SLModes

Want to explore C Ionian #2 deeper?

Try it in SLModes.

SLModes helps you hear and visualize modes through:

  • Interactive chords
  • Guitar fretboard layouts
  • Modal modulation tools
  • Scale and chord relationships
  • Negative harmony exploration

For a mode like Ionian #2, this is especially useful because the sound is unusual. You can quickly test Cmaj7(#9) voicings, build modal vamps, see the notes across the neck, and experiment with how the mode changes under modulation.

Open C Ionian #2 in SLModes and start with a C drone, a Cmaj7(#9) chord, and the fretboard shape above. Then follow your ear.