musictheory_cov

12. As already mentioned, in a major scale, the sixth or seventh intervals are always
    major. In a minor scale, these same intervals are minor because the interval is a
    semitone smaller.


13. To find the quality of the 6th or 7th, refer to the major scale. Construct a major
    scale from the lower note. If your second note is exactly the same as in the major
    scale, your 6th or 7th is major.


14. However, at times, it is difficult to determine the nature of the interval by using
    the major scale as a reference. There is, however, a memory aid that can be useful.
    Find the complementary or inverted interval and you will be able to find the
    nature of the first interval. To find the complementary or inverted interval, all you
    have to do is invert the interval like so:


15. In Level Three you studied inverted or complementary intervals. Let's review.

Intervals

6th 3rd

6th minor

7th minor

7th major

6th major