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| Interval | Ratio | Limit | Description |
|---|---|---|---|
| Root | 1:1 | 1 | Fundamental frequency (unison). |
| Minor 2nd | 16:15 | 5 | Pure chromatic semitone. |
| Major 2nd | 9:8 | 3 | Standard whole tone. |
| Minor 3rd | 6:5 | 5 | Clear, stable minor third. |
| Major 3rd | 5:4 | 5 | Pure major third (no beating). |
| Perfect 4th | 4:3 | 3 | Perfectly consonant fourth. |
| Septimal Tritone | 7:5 | 7 | Smooth 7-limit tritone. |
| Perfect 5th | 3:2 | 3 | Most stable harmonic interval. |
| Septimal Minor 6th | 14:9 | 7 | Dark, resonant septimal ratio. |
| Major 6th | 5:3 | 5 | Bright, consonant major sixth. |
| Harmonic 7th | 7:4 | 7 | Ultra-pure "Blue" seventh. |
| Major 7th | 15:8 | 5 | Sharp, pure leading tone. |