Interval qualities

The name of any interval is qualified using the terms perfect (P), major (M), minor (m), augmented (A), and diminished (d). This is called its interval quality. (Wikipedia)

With this course you can practise seconds and thirds which can be major or minor.

Nice to know. Intervals can be classified into two groups:

• 2, 3, 6, 7 are usually major or minor (sometimes also diminished or augmented)
• 1, 4, 5, 8 are usually perfect (sometimes also diminished or augmented)