This section tests whether you can determine the notes that make up any chord/arpeggio (chords and arpeggios share the same notes). The chord is randomly chosen from the selected categories. They include major, minor, and dominant/augmented/diminished family chord types. To test your chord knowledge, first select one of the three categories. Then click the "Start" button. This will randomly generate the chord. The notes shown will automatically come from the chord's corresponding scale. Select the correct notes that make up that chord and click the "Check Answer" button. If the notes are correct, click the "Start" button to try another chord. If the notes are incorrect, change the notes and click "Check Answer" button again to verify the answer.