The Seven Modes of MMA

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Music & Science

The Seven Modes of MMA

A detailed portrait of each mode of the Melodic Minor Ascending scale — its interval structure, characteristic sound, chord function, and place in the key center coverage system.

Bruce ArnoldMusic & Science

The Melodic Minor Ascending scale, like the major scale, generates seven modes — one starting from each of its seven pitch classes. Unlike the major scale’s modes (Ionian, Dorian, Phrygian, Lydian, Mixolydian, Aeolian, Locrian), the MMA modes are less familiar to most musicians, though they have been named and catalogued in jazz theory since the 1960s. Understanding each mode — its interval structure, its characteristic sound, and its chord function — is essential to working with the SuperScales system.

Each mode is presented here from the root C, so all seven modes share the same tonic while showing different interval relationships above it. This is the key center approach: the reference point stays fixed, and the scale changes around it.

1Melodic Minor Ascending (MMA itself)CmΔ7
C   D   E♭   F   G   A   B
Character: Minor with a raised 6th and 7th — emotionally complex, neither fully minor nor major. The raised 7th creates a strong leading tone pull upward while the flatted 3rd maintains the minor quality. Chord: Minor major seventh (CmΔ7) — a minor triad with a major seventh, one of the most emotionally loaded chords in jazz. Found in the opening chord of many film scores and jazz standards. Practice note: The combination of minor third (Eb) and major seventh (B) creates a semitone cluster at the top of the scale — B to C — that distinguishes this mode from any major mode.
2Dorian b2 (Phrygian nat6)Cm7sus♭9
C   D♭   E♭   F   G   A   B♭
Character: Dark, Spanish-inflected, with the flatted second (Db) creating an exotic tension against the tonic. The natural 6th (A) prevents it from sounding purely Phrygian — there is a brightness that cuts through the darkness of the b2. Chord: Dominant 7sus4 with flat 9 — a suspended dominant with maximum tension in the b9. Common in contemporary jazz over pedal points and drone-based music. Practice note: The Db is the note that most clearly marks this mode as outside diatonic major. Internalizing the sound of a flatted 2nd against a tonic drone is the key ear training task for this mode.
3Lydian Augmented (Lydian #5)CΔ7♯5
C   D   E   F♯   G♯   A   B
Character: Bright, floating, otherworldly — the raised fourth (F#) and raised fifth (G#) create a whole-tone quality in the middle of the scale that pushes the sound toward something unanchored and dream-like. Used by Messiaen and associated with the supernatural in film music. Chord: Major seventh with augmented fifth (Δ7#5) — not a common chord in jazz but important in contemporary and film music. The augmented fifth is the note that gives this mode its distinctive hovering quality. Practice note: The F# and G# together form a whole tone that sits in the middle of an otherwise quasi-major scale — this whole-tone pocket is the signature sound of this mode.
4Lydian Dominant (Overtone Scale)C7♯11
C   D   E   F♯   G   A   B♭
Character: Bluesy and bright simultaneously — the raised fourth (F#, the #11) combined with the dominant seventh (Bb) creates a tension that is immediately recognizable. This is one of the most used MMA modes in jazz, associated with Bartók, Simpsons theme music, and tritone substitutions. Chord: Dominant seventh with sharp eleven (7#11) — the signature “Lydian dominant” sound. Standard over IV7 chords in blues and jazz, and over tritone substitutions. Practice note: The tritone between the root (C) and the #11 (F#) is the defining interval — learn to hear this tritone as a characteristic sound of the Lydian Dominant mode.
5Mixolydian b13 (Hindu Scale)C7♭13
C   D   E   F   G   A♭   B♭
Character: The primary dominant mode — a standard Mixolydian (flat-7 major scale) with the 13th flatted. The Ab creates a minor quality in the upper structure while the rest of the scale remains major-like. Associated with Indian classical music (hence “Hindu scale”) and used over V7b13 chords. Chord: Dominant seventh with flat thirteen (7b13) — the most common alteration of the primary dominant in jazz. The b13 adds tension that resolves naturally to the major third of the tonic. Practice note: This is the mode used over the primary dominant (G7b13 in the key of C). In the SuperScales framework, G MMA gives you Mixolydian b13 over G7, which is the most colorful standard dominant sound.
6Locrian nat2 (Half-Diminished)Cm7♭5
C   D   E♭   F   G♭   A♭   B♭
Character: The half-diminished mode — Locrian with a natural second (D instead of Db). The natural 2nd (D) over a half-diminished chord (m7b5) is the note that characterizes this mode and distinguishes it from the standard Locrian. This natural 2nd (functioning as the 9th of the chord) gives the otherwise dark Locrian sound a note of openness. Chord: Minor seventh flat five (m7b5, half-diminished) — the chord that appears naturally on the 7th degree of a major scale. In minor key jazz, the IIm7b5 chord is one of the most common uses of this mode. Practice note: The tension between the half-diminished chord quality (very dark) and the natural 9th (relatively open) is the distinctive sound of this mode — darker than any major mode but not as closed as standard Locrian.
7Altered Scale (Superlocrian / Diminished Whole-Tone)C7alt
C   D♭   E♭   F♭   G♭   A♭   B♭
Character: Maximum tension — every note is altered (flatted) except the root and dominant seventh. The b9 (Db), #9 (Eb), b5/b12 (Fb=E), and b13 (Ab) create the most dissonant scale in the MMA system. This dissonance is designed to resolve — the Altered scale is used exclusively over dominant seventh chords where maximum tension is desired. Chord: Altered dominant (7alt) — covers all four standard dominant chord alterations simultaneously. The most powerful dominant scale in jazz, used by Miles Davis, John Coltrane, Bill Evans, and virtually every post-bop jazz musician. Practice note: Because every note (except the root and b7) is flatted, the Altered scale sounds initially like a chromatic cluster over the dominant chord. The ear training task is to hear each altered note as a specific tension with a specific sound against the key center drone — not as random chromaticism but as organized tension.

MMA Modes vs. Major Scale Modes — The One-Note Differences

Each MMA mode differs from the corresponding major scale mode by exactly one note — the flatted third of MMA propagates through the modes in different positions, creating the characteristic sound of each MMA mode. Understanding these one-note differences is the fastest way to hear the MMA modes if you already know the major scale modes:

MMA Modes vs. Major Scale Modes — One-Note Differences
MMA Mode Major Scale Equivalent What Changes
MMA (Mode 1)Ionian (major)3rd flatted (E→Eb)
Dorian b2Dorian2nd flatted (D→Db)
Lydian #5Lydian5th raised (G→G#)
Lydian DominantMixolydian4th raised (F→F#)
Mixolydian b13Mixolydian6th flatted (A→Ab)
Locrian nat2Locrian2nd raised (Db→D)
AlteredLocrian4th also flatted (F→Fb=E)

Building the Ear Training — One Mode at a Time

The ear training approach for the MMA modes follows the same key center principles as the hexatonic ear training: drone always present, short repeated sessions, hear each mode’s degrees in relation to the fixed tonic rather than in relation to the mode’s own root. The sequence recommended in the SuperScales book moves from the most consonant modes to the most dissonant: Lydian Dominant first (familiar #11 sound), then Mixolydian b13 (primary dominant), then MMA itself, then Locrian nat2, then Dorian b2, then Lydian #5, then Altered last.

The Altered mode requires the most ear training time because its chromatic density makes scale degree recognition most challenging. But it is also the most musically powerful mode — and the one that appears most frequently in the secondary dominant coverage. Building fluency with the Altered mode is not optional for a musician who wants to navigate secondary dominants through the SuperScales framework.

The seven modes and their musical logic

One scale, seven sounds

The seven MMA modes are seven different sonic perspectives on the same set of pitch relationships. The same seven notes, started from different positions, create seven fundamentally different harmonic characters — from the open Lydian Dominant to the closed Altered.

The Altered mode as limit case

The Altered scale is the extreme limit of the MMA mode spectrum — every available tension present simultaneously. It is the most dissonant, the hardest to hear, and the most powerful for dominant resolution. Its position as the 7th mode of MMA is mathematically determined by the scale’s interval structure.

One-note differences

Each MMA mode differs from its major scale equivalent by exactly one note. This one-note difference is the source of each mode’s characteristic sound — the flatted 3rd of MMA, appearing in different positions in each mode, creates a specific coloration against the otherwise major-scale structure.

Chord-mode correspondence

Each mode’s characteristic sound corresponds directly to a specific chord type. This correspondence is not arbitrary — the mode’s intervals determine which chord tones are present and which scale tones function as tensions, creating a mathematical match between scale structure and chord function.

Seven Lenses on One Scale

The seven MMA modes are seven different ways of hearing the same scale — seven different harmonic identities that emerge from the same interval structure depending on which pitch class is treated as the reference point. Mastering all seven is the work of the SuperScales ear training system: not memorizing seven different scales but learning to hear seven different relationships to a fixed key center, all generated by one scale family.

The next article moves into mathematics: what set class 7-34 is, why MMA’s interval vector makes it unique among all 66 heptachords, and what the combinatorics of the scale’s subset structure reveal about its harmonic richness.

The MMA modes are documented in Levine, The Jazz Theory Book (1995), Bergonzi, Inside Improvisation series (1994–), and Russell, The Lydian Chromatic Concept (2001). The SuperScales ear training curriculum for all seven modes, with MIDI drones and exercises in all 12 keys, is at muse-eek.com.

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