Part 5 — The Seven Names and the Twelve Slices
The Story of Music : Why our note‑names and our twelve‑step octave never quite line up — and why that mismatch works.
There was chaos on the roads in and out of Vienna today. Priests, peasants and artisans were blocking the laneways with carts, beasts, and whatever else they could drag across the mud. Travel and trade were at a standstill.
Richard Roe of Sussex, who had travelled for a week with a troupe of mummers to attend the protest, was clear in his view.
“It’s not right,” he said. “Those toffy‑nosed composers, organists and clavichord‑builders want it all their own way. We’re not having it. We’ve always had seven, and we’re stickin’ with seven.”
Our correspondent also spoke with the choirmaster at Köln Cathedral. Not wishing to be identified, he described growing tensions within his own community.
“The organ builders are insisting on their new engineering,” he said, glancing toward the workshop. “Twelve equal slices, each with its own place. But my lead singers still live in the old world. Their pitches bend and breathe. They sing from memory, from tradition. Matching that to the new instrument…” He paused. “Let us say it has not been easy.”
Meanwhile in Paris, a spokesman for the rationalist school dismissed the unrest entirely, insisting that “twelve equal tones demand twelve equal names,” and suggesting that resistance was merely “a failure of the provincial imagination.”
The Real Argument Behind the Riot
Of course, none of these events ever took place. But the tensions they hint at were real enough, and they lasted far longer than any imagined protest. Across Europe, singers and musicians lived for centuries inside a seven‑tone world shaped by memory, ritual and the body; While instrument‑makers and theorists slowly pushed toward a new landscape that could be measured, divided and engineered. Behind the noise and the mud, the real dispute was simple: seven inherited names trying to find their place on a new twelve‑step octave. The shift was not sudden. It took generations for the old modal behaviours to bend toward tempered ones, and even now the migration is incomplete: Folk singers still lean into the old flexible pitches, and modern fretted instruments still carry the imprint of the rational grid.
Laying the Octave Out Straight
As an English folk singer and an Irish sean‑nós singer, as well as a guitar player, I feel that divide in my own hands and voice; there are songs where I simply lay the guitar aside because the instrument’s fixed slices can’t follow where the melody wants to go.
When the twelve‑slice chromatic system finally settled in, it didn’t replace the old order, it simply laid itself over it. The seven names stayed because they were already woven into how people heard. To see how the old seven‑tone world settled into the new twelve‑slice one, it helps to lay the octave out as a straight line. Seven of the slices inherited the old names- C, D, E, F, G, A, B - because those were already the familiar places in the musical landscape.
I’ve used the Ionian mode here - the modern major scale - not because it is special, but because it is the only seven note diatonic pattern that uses all seven letter names with no need to use nudge the notes up or down, no need to use accidentals.
For us, this gives the clearest view of how the inherited seven‑note world was nudged onto the new grid. With C to C in their familiar sequence.
What about the other 5 steps
The other five steps (or slices) had no names at all; but they weren’t simply the spaces between the old pitches. When equal temperament arrived, the named pitches had to shift slightly to fit the new geometry. Some moved a little up, some a little down, and some stayed close to where they had always lived. The arrows above the note names in the diagram show the direction of that movement.
The unnamed slices were still needed. They became the substitute slices you reached for when you changed key. If you moved from singing in the key of C to the key of D, the old F no longer sat in the right place. The interval between E and F was now much too small, and the interval between F and G was far too wide - a wolf tone - with the pitch of F sitting uncomfortably low. The melody naturally wanted a slice between F and G; So that unnamed slice sitting between the F and G of the new chromatic scale, became the stand‑in for F in the key of D. It was still an F, but now it lived in a different place. Singers did what they always did: they nudged the F up to the nearest workable interval. And when musicians needed to show that nudge in writing, they kept the old name but marked it with a sign: F♯ - the sharp. The tone was familiar; the label simply told us it had been nudged.
A pattern emerges
Once the old modal pitches had found their nearest places on the new twelve‑slice line, something simple but important became visible. The shapes of the modes were still there. Their spacing - a long step, another long step, then a short one, and so on - had survived the drift. What changed was not the shape of the melody but the surface it rested on. And when those familiar shapes were laid against the even steps of the tempered octave, they revealed themselves as interval patterns we could describe: 2–2–1–2–2–2–1 for the Ionian mode, and other patterns for the other modes. These patterns weren’t invented. They were the natural outlines of the older modal world, made visible by the new chromatic grid.
Discovery experiment for your guitar
Take your guitar and play an open A string. Now slide up two frets and play the next note. Then two more, and again, following this pattern from the nut:
Open – 2 – 2 – 1 – 2 – 2 – 2 – 1
You’ll end up at the twelfth fret, having played a major scale in A. Now, if you’re in the mood, name the seven notes inside the two As of the octave. How many sharps are there? In other words: how many of the original seven notes had to be nudged up to recreate an approximation of the old modal scale?
The answer is three.
We’re Stickin’ With Seven
So, just as Richard Roe in our fictional newspaper article demanded, we still have the seven original note‑names. And as had always been the case, a different key called for a note with the same name but a different pitch, to suit each scale and each mode. But now when notes were nudged. that simple modal practice was recorded by adding a sharp or a flat symbol to the name label of the note.
So now equal temperament had “rationalized” that long‑standing practice of nudging a pitch up or down; And it did so by giving each of those nudged positions a fixed place inside the octave. And that’s how our modern accidentals were born.
Accidentals
In the older musical world, the important thing was the name of the note, not its exact pitch. Singers learned by letter names and by the shapes of the modes - the familiar melodic paths that singers knew by ear - and they nudged pitches as needed to make the line work. Those nudges were considered accidental to the note - temporary adjustments, not new notes. Equal temperament later fixed those adjustments into permanent places inside the octave, but the old way of thinking survived in the symbols we still use.
Today's student consternation wirh sharps and flats arises because we've learned to treat pitch as the primary thing and the name as secondary; which is why accidentals can feel so arcane: they come from a culture where the name stayed constant and the pitch was the part that moved. We don’t do that in the modern world so we have a naming system that confuses the simplicity of the 12 note palette available to us
Take-Away
The seven note‑names we use today aren’t logical inventions; they’re cultural survivors. They come from an older, flexible, modal world - one that gradually settled onto the twelve equal slices of the modern chromatic scale. While the unnamed slices became the substitute pitches we used whenever we weren’t in C. But they kept the same old labels - C, D, E and so on - with an added sign to show they’d been nudged up or down to keep the shape of the familiar mode they were performing in
Those sharps and flats were simply the marks that let the old melodic shapes find their nearest home on the new twelve‑step grid. And once those shapes were visible, they became the interval patterns we now call scales. The diatonic system isn’t a break with the past; it’s the past made legible. And that’s where we go next.
”The Story of Music” is a complicated one. Told weekly in this series, it keeps unfolding. To explore more you’re invited to join a conversation in The Story of Music reader’s room.