Every chord quality on every root: 12 roots by 16 qualities, spelled and playable, with piano and guitar views in the app.
The library covers triads (major, minor, diminished, augmented, sus2, sus4), the five seventh qualities, and the extended set (6th, minor 6th, add9, 9th, minor 9th). The seventh-chord spellings below are generated from the same data the trainer plays.
| Quality | Offsets | On C |
|---|---|---|
| Major 7th | 0 - 4 - 7 - 11 | C E G B |
| Dominant 7th | 0 - 4 - 7 - 10 | C E G A♯ |
| Minor 7th | 0 - 3 - 7 - 10 | C D♯ G A♯ |
| Diminished 7th | 0 - 3 - 6 - 9 | C D♯ F♯ A |
| Half-Diminished 7th | 0 - 3 - 6 - 10 | C D♯ F♯ A♯ |
Common questions
How many chord types should I learn to hear?
Four triad qualities and five seventh qualities cover the overwhelming majority of real music; extensions refine, they rarely replace.