We invert an interval by taking the bottom note and plac=-
ing it on topl or by taking the top note and placing it on
bottom. EXAMPLE:

 

UPON INVERSION:
Perfect intervals remain perfect.

A prime becomesan octave. An octave becomes a prime.
A fourth becomes a fifth. A fifth becomes a fourth.
Major intervals becomeminor.

Minor intervals become major. :

A third becomes a sixth. A sixth becomes a third.

A second becomes aseventh. A seventh becomes a second.
Augmented intervals become diminished.

Diminished intervals become augmented.
EXERCEES

Make a chart of all the possible intervals and their in-

versions. Use C as the key tone. Pelow is a layout of the

chart.

Perf. Prime Aug.Prime Dim.Prime
Maj.Sec. Min.Sec. Aug.Sec. Dim.Sec.
Maj.Third Min.Third Aug.Third Dim.Third
Perf.Fou. Aug.Fou. Dim.Foue.
Perf.Fifth. Aug.Fifth Dim.Fifth
Ma).Sixth Min.Sixth Aug.Sixth Dim.Sixth
Maj.Sev, Min.Sev. Aug.~ev. Dim.Sev.
Perf.Oct. Augz.Oct. Dim.Oct.

ALL INVERSIONS OF THE ABOVE.