Brainlag Plus
Brainlag PlusMajor, minor and perfect intervals
The number of an interval from the letter names, then its type, major, minor or perfect, from the semitones, for intervals above the tonic.
Number, then type
At Grades 1 and 2 you gave an interval its number, counting the letter names from the lower note to the upper one, counting both. Grade 3 adds its type:
- 2nds, 3rds, 6ths and 7ths above the tonic of a major key are major.
- 4ths, 5ths and octaves above the tonic are perfect.
- An interval one semitone smaller than major is minor.
| Interval | Semitones | Interval | Semitones |
|---|---|---|---|
| major 2nd | 2 | perfect 5th | 7 |
| minor 3rd | 3 | minor 6th | 8 |
| major 3rd | 4 | major 6th | 9 |
| perfect 4th | 5 | minor 7th | 10 |
| major 7th | 11 | ||
| perfect octave | 12 |
The rest of this lesson and its 4 practice questions are in Plus.
Screen 1 of 4, free to read.
- 4 exam-style questions, marked as you go, each with a worked solution
- Anything you get wrong is saved to your flashcards