Number Notation
What Is Number Notation?
Number notation represents each scale degree as a numeral from 1 through 7, with sharps and flats applied to indicate chromatic alterations. The number 1 always represents the tonic (root) of the key, 5 is the dominant, and so on. This system strips away letter names entirely and focuses on the functional relationship between notes.
This approach is closely related to the Nashville Number System, widely used by session musicians in Nashville and beyond to quickly transpose songs and communicate chord progressions without being tied to a specific key. In Tunable, number notation displays all pitches as scale degrees relative to the selected key, making it easy to see intervallic relationships at a glance.
Number notation is especially valuable for musicians who play by ear, transpose frequently, or want to understand the harmonic structure of music independent of any specific key. It's a natural companion to Roman numeral analysis used in music theory.
Note Names
| Degree | Numbers | English |
|---|---|---|
| 1 (Tonic) | 1 | C |
| ♯1/♭2 | 1♯ | C♯/D♭ |
| 2 | 2 | D |
| ♯2/♭3 | 3♭ | D♯/E♭ |
| 3 | 3 | E |
| 4 | 4 | F |
| ♯4/♭5 | 4♯ | F♯/G♭ |
| 5 | 5 | G |
| ♯5/♭6 | 6♭ | G♯/A♭ |
| 6 | 6 | A |
| ♯6/♭7 | 7♭ | A♯/B♭ |
| 7 | 7 | B |
Where It's Used
- Nashville session musicians and the Nashville Number System
- Chinese Jianpu (numbered musical notation) tradition
- Transposing musicians who need key-independent pitch reference
- Music theory education for scale degree analysis
- Worship and church music communities for quick transposition
History & Origin
The concept of numbering scale degrees dates to at least the 18th century, when theorists began using Arabic numerals alongside Roman numerals to describe melodic and harmonic function. The Nashville Number System was developed in the late 1950s by Neal Matthews Jr. of the Jordanaires, Elvis Presley's backing vocal group. Session musicians in Nashville adopted it widely because it allowed them to sight-read chord charts and transpose instantly during recording sessions. Meanwhile, in China, the Jianpu system — which uses numbers 1–7 to represent scale degrees — has been a primary notation method since the early 20th century, adapted from a French system introduced by Jean-Jacques Rousseau in the 18th century.
How It Compares
The same twelve chromatic pitches in Number Notation vs other notation systems:
| English | Numbers | English | French (♯) |
|---|---|---|---|
| C | 1 | C | Ut |
| C♯/D♭ | 1♯ | C♯ | Ut♯ |
| D | 2 | D | Re |
| D♯/E♭ | 3♭ | E♭ | Re♯ |
| E | 3 | E | Mi |
| F | 4 | F | Fa |
| F♯/G♭ | 4♯ | F♯ | Fa♯ |
| G | 5 | G | Sol |
| G♯/A♭ | 6♭ | A♭ | Sol♯ |
| A | 6 | A | La |
| A♯/B♭ | 7♭ | B♭ | La♯ |
| B | 7 | B | Si |
Using Number Notation in Tunable
Tunable supports Number Notation alongside 14 other notation systems. Switch notation in Settings → Tuner → Notation to display all note names, scale degrees, and chord roots in Number Notation throughout the app.
FAQ
Is number notation the same as the Nashville Number System?
They share the same core principle — using numbers to represent scale degrees — but the Nashville Number System is a complete chart notation method with conventions for rhythm, form, dynamics, and modulation that go beyond simple pitch numbering.
How do you handle chromatic notes in number notation?
Chromatic notes use sharp (♯) and flat (♭) symbols applied to the nearest diatonic scale degree. For example, the note between 4 and 5 is written as 4♯ (or 5♭), representing the tritone above the tonic.