Major Second Interval (Whole Step)

major second overview

A major second spans two half steps. From C, for example, a major second up is D. The number in its name counts the letter names it covers, including both ends: from C to D, C D is two, so it is a second. The two half steps make it major. With one half step less, C to D♭, it would be a minor second.

Lesson Steps

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The whole step is the ordinary step of melody; most of the steps in a major scale are whole steps. Played together, the two notes still brush against each other, but more gently than a half step. In a melody it simply sounds like moving on.

On the keyboard, a major second always has one key between its two notes. Depending on where it starts, those notes can fall on white or black keys, which gives it four different shapes.

The shapes of the major second on the piano

Each shape sits a little differently under the hand, so it is worth knowing them all. Under each keyboard, the same notes are on the staff: played together, then up, then down.

White key to white key: C to D

Major seconds that share this same shape are C–D, D–E, F–G, G–A, and A–B. There is one key in between, a black key.

White key to black key: E to F♯

Major seconds that share this same shape are E–F♯ and B–C♯. There is one key in between, a white key.

Black key to white key: E♭ to F

Major seconds that share this same shape are E♭–F and B♭–C. There is one key in between, a white key.

Black key to black key: D♭ to E♭

Major seconds that share this same shape are D♭–E♭, G♭–A♭, and A♭–B♭. There is one key in between, a white key.

Reading the major second on the staff

A second goes from a line to the next space, or from a space to the next line: the two notes are neighbors. Played together, the note heads are too close to stack, so they sit side by side, touching. That stays true whatever the accidentals are: every second looks like a second, and the accidentals tell us its quality.

This is what makes intervals so useful for reading. Rather than naming every note from the clef, we read from one note to the next: once we know where we are, the shape on the staff tells us how far to move. Reading this way is relational rather than absolute, and it is much faster.

It works the same in the treble and bass clef, and at any height on the staff, so a reader who knows the look of a second recognizes it everywhere.

The major second in the hand

In scales and five-finger patterns, seconds usually fall under neighboring fingers: 1 and 2, 2 and 3, 3 and 4. A whole step is the spacing of a relaxed hand in a five-finger position, which is why the whole step rarely feels like a reach.

The spacing on the staff and the spacing in the hand belong together. In a five-finger pattern, a step on the staff is often the next finger, and a skipped note a skipped finger, so the distance we see becomes a distance we feel.

Inverting the major second

If we move the lower note up an octave (or the upper note down one), a major second becomes a minor seventh: C to D turns into D to C. The numbers of an interval and its inversion add up to nine, and their half steps to twelve (2 + 10). Major becomes minor.

On the keyboard the shapes swap as well: a white-to-black shape inverts to a black-to-white one, and a white-to-white shape stays white to white.

Practice the major second

Play the first shape, C to D, together and then one note after the other, and listen to the sound before moving on.
Find the same shape at every place it occurs on the keyboard (the lists under each image), then the other shapes. Notice how the hand changes as the keys change color, while the sound stays a major second.
Play a major second up from all twelve keys, naming the upper note as we go.
Read it: look for major seconds in a piece we know, and before playing each one, name the interval from its look on the staff.
Once the shapes are reliable, play the interval without looking at the hands, feeling the span between the fingers.

Avoid common mistakes with the major second

Missing the white-to-black shapes. E to F♯ and B to C♯ are whole steps too. On the white keys E–F and B–C are only half steps, so the black key is needed to make the whole step.
Counting keys instead of half steps. The starting key isn’t counted: from C, the first half step is C♯.
Reading every note from the clef. Naming each note separately is slow. Reading the interval from the previous note is what lets the eye stay ahead of the hands.