The Ear Training Lab

Applying new settings will restart the game and reset your score!

Each of these 6 chords is a jazz or gospel-flavoured extension of a dominant, major or minor 7th. The interval formula (in semitones from the root) decides which kind you hear:

Dominant 7♯9: 0, 4, 7, 10, 15
Dominant 7♭9: 0, 4, 7, 10, 13
Dominant 7♯5: 0, 4, 8, 10
Major 7♯11: 0, 4, 7, 11, 18
Minor 9: 0, 3, 7, 10, 14
Major 6/9: 0, 4, 7, 9, 14

The two altered dominants (♯9 and ♭9) share the same tense 3-7-10 core but differ in their upper extension; Dominant 7♯5 raises the 5th instead of adding an upper extension; Major 7♯11 stacks a bright raised 11th two octaves above the root; Minor 9 and Major 6/9 both add a smooth 9th on top of a simpler underlying chord.

Use the Reference Chords at any time to re-orient your ear — they always play all 6 kinds regardless of your active settings.

Keyboard shortcuts: Number keys 1–6 = answer choices (in on-screen order), R = Replay, Space/Enter = Next.