Ionian #2

A major scale with one note moved

Six of the seven notes belong to the plain major scale, and only the second degree is altered. From C that means D♯ instead of D, while E, F, G, A and B all stay exactly where a major scale puts them.

Hearing the mode therefore depends entirely on that one pitch. Play a major scale and raise the second by a half step, and the whole character arrives without any other change in fingering or key signature.

The augmented second sits directly above the tonic

Raising the second opens three semitones between the root and the next degree — C to D♯. Among the seven modes of the Neapolitan minor this is the only one where the augmented second stands immediately above the tonic, and that placement makes it impossible to miss.

Every other rotation of the family hides the interval somewhere in the middle or top of the scale, so a melody has to travel before it meets the leap. Here the first step already carries it, and even a two-note phrase announces the mode.

The chord nobody writes

Stacking thirds from the root gives C E G B, a major seventh chord, and the raised second becomes a sharp ninth above it. Cmaj7♯9 is a genuinely rare symbol, because the sharp ninth normally belongs to dominant chords and sounds harsh against a major seventh.

That harshness is the point rather than a flaw. D♯ sounds the same as E♭, a half step below the major third, so the chord holds a minor and a major third at once — the blues collision transplanted into a major seventh.

Against Lydian #2

Lydian #2 raises the same second degree but also raises the fourth: C D♯ E F♯ G A B. One note separates the two scales, F against F♯, and it decides whether the mode sounds settled or floating.

The natural fourth here keeps the scale anchored to an ordinary major sound, which makes the raised second stand out more sharply. Lydian #2 spreads the strangeness across two altered degrees; this mode concentrates all of it in one.

Where it comes from

Rotating the Neapolitan minor onto its sixth degree produces the mode. E Neapolitan minor is E F G A B C D♯, and reading those same seven notes from C gives C D♯ E F G A B.

Knowing the parent explains the odd spelling. The raised second is written as D♯ rather than E♭ because in the parent scale it functions as a leading tone to E, and the mode inherits that spelling along with the notes.

Frequently asked questions