Intervals
Interval Construction
Lesson 4
Perfect 4ths & 5ths: The Pillars
Build the two pillars of harmony above every natural root. All are pure letter counts except the F–B pair — a perfect 4th above F needs Bb, a perfect 5th above B needs F#.
Beginner
~5 min
perfect-intervals
fourths
fifths
Choose question count
0 / 2 sessions used todayFree users can always practice 5 questions. Upgrade to Premium for full sets.
Skills you'll train
interval building