Guided Advanced course · about 12–15 minutes
You now transfer the boundary intervals from the previous course into descending motion. Distinguish semitone from whole tone, minor from major seventh, and the tritone between fourth and fifth – now moving from the higher note downwards.
Guideline per section: at least 4 of 5 answers. You can immediately repeat a section below that mark; this is a learning path, not a final exam.