Guitar Lessons
Musical intervals and frequency ratios
In music theory an interval is the distance between two notes pitches.
Table 1 represents musical intervals and their frequency ratios.
| Interval | Number of semitones | Frequency ratio |
|---|---|---|
| Perfect unison | 0 | 1,0000 |
| Minor second | 1 | 1,0595 |
| Major second | 2 | 1,1225 |
| Minor third | 3 | 1,1892 |
| Major third | 4 | 1,2599 |
| Fourth | 5 | 1,3348 |
| Diminished fifth | 6 | 1,4142 |
| Perfect fifth | 7 | 1,4983 |
| Augmented fifth | 8 | 1,5874 |
| Sixth | 9 | 1,6818 |
| Minor seventh | 10 | 1,7818 |
| Major seventh | 11 | 1,8897 |
| Octave | 12 | 2,0000 |
Table 1 Musical intervals and their frequency ratios
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