An interval is the way we measure the distance between two notes. An interval inversion is what you get when you move the lower note up an octave. Get it? Well, you’re about to find out. Test yourself with our latest quiz.
How did you go? What topics would you like to see future quizzes on?

100% =D
Question 7 has the same answer twice. Just so you know.
Question number 1 and 6 were incorrect for me. Unless the inversion of a perfect octave is now a perfect octave and an inversion of a perfect unison is a perfect unison now. Haha. Also, as previously mentioned, question number 7 lists minor third twice.
Hi Nobody. Thanks for that feedback. I always think the inversion of a perfect octave is a perfect octave, and a perfect unison is a perfect unison. But according to the definition I used in the intro, I’m wrong! I’ll upload a corrected quiz, and you should mark yourself as 100%. Thanks!
That’s fixed now. Feel free to redo the test if you’d like to see 100% officially there on the screen.
I agree with nobody too. I was wrong on 1 n 6 too.
Haha listen to us, we are theory nerds!
Don’t want to put out any spoilers, but this is what I teach my theory classes for interval inversion:
The two intervals must add up to “9″.
And except for Perfect intervals, the quality switches:
Major becomes Minor (and vice versa)
Augmented becomes Diminished (and vice versa)
Great tips, Dave. Thanks!