Reactive ear training
Random chords, one after another, with no key and no labels. Play over each one by ear — hear whether it's bright or dark, tense or at rest, and let your fingers find what fits. Turn the dial up as your ear grows.
Press play and react
Complexity
1. Major and minor triads
Time between chords
Instrument
Tip: start blind at level 1 and only hit Reveal after you've guessed major or minor. The slider is the whole exercise — move up a level when the chords stop surprising you.