Path
What to study before Chord quality recognition
Hearing a chord's quality without counting its notes: major, minor, diminished, augmented. Below, the concepts that come before, in the order in which one explains the next. Signed in, you see the same path minus what you already hold: your path.
Notes and semitones
The seven letter names, the accidentals that alter them, and the semitone as the system's smallest step.
Intervals
The distance between two notes, measured by a number taken from the letter names and a quality taken from the semitones.
Triads
Three-note chords stacked in thirds, and the four qualities that result.
Interval recognition
Identifying by ear the distance between two notes, the skill everything else in aural training rests on.
Chord quality recognition
Hearing a chord's quality without counting its notes: major, minor, diminished, augmented.