Aeolian #4

One note from the natural minor

Natural minor from C is C D E♭ F G A♭ B♭. Raising the fourth to F♯ produces this mode and changes nothing else, so the minor identity survives whole: flat third, flat sixth and flat seventh all stay where they were.

Because only one degree moves, the scale is easiest to reach from a shape already in the hands. A minor pentatonic or natural minor position with the fourth pushed up a fret gives the sound immediately, and the raised fourth is the note to lean on rather than pass through.

Why searching for Aeolian turns up pianos

Anyone looking this scale up by name meets two obstacles that have nothing to do with music theory. The Aeolian Company was a large American maker of pianos and player pianos, so a search for the word returns instruments for sale far more often than it returns modes.

The second obstacle is the aeolian harp, a real instrument sounded by wind rather than hands. Both share the name of the Greek god of wind, and neither has any connection to the fourth mode of the Neapolitan minor. The mode is spelled with a raised fourth after the name, and that number is the part worth typing.

The augmented second and the chord underneath

Between the flat third and the raised fourth lie three semitones, E♭ to F♯ — the augmented second every mode of this family inherits. Placed this low in the scale, it colours almost any melodic line, because a phrase barely has to leave the tonic to run into it.

Stacking thirds gives C E♭ G B♭, an ordinary minor seventh chord. What the mode adds above it is a raised eleventh and a flat thirteenth, so the full sound is Cm7 with F♯ and A♭ layered on — a minor chord with a tritone above its root.

Two scales called Hungarian, and how to tell them apart

Reference books hand the names Hungarian and gypsy to several different scales, and this mode receives both. Names will not separate them; note content will. Aeolian #4 is C D E♭ F♯ G A♭ B♭, with a flat seventh.

The Hungarian minor, sometimes labelled gypsy minor, is C D E♭ F♯ G A♭ B — identical except for a natural seventh, and it belongs to the double harmonic family rather than this one. One note decides which scale is in front of you, and it is the last one.

Against Dorian #4

Dorian #4 also raises the fourth over a minor third: C D E♭ F♯ G A B♭. Only the sixth degree separates the two, A against A♭, and that degree carries the whole difference in mood — Dorian #4 stays open and folk-like, while the flat sixth here pulls the scale towards harmonic minor.

Choosing between them is a practical decision about the sixth. Over a static minor chord the natural sixth of Dorian #4 sounds brighter; the flat sixth of this mode sits a half step above the fifth and creates tension that wants to fall.

Frequently asked questions