The terms Perfect, Augmented and diminished also apply to FOURTHS. A Perfect FOURTH can be defined by looking at basic FOURTHS (unaltered by accidentals). Think of basic pitches as being only the white keys of the piano. The following example shows all the basic FOURTHS within an octave.
All basic FOURTHS are Perfect except for one. Can you find it? DRAG YOUR MOUSE over the example to discover which basic FOURTH is not a Perfect FOURTH.
Perfect FOURTHS contain five (5) half steps. F to B is six (6) half steps, so that basic FOURTH is an Augmented FOURTH.
The terms Perfect, Augmented and diminished also apply to FIFTHS. Again, to examine and define FIFTHS, we must look at basic FIFTHS. The next example shows all the basic FIFTHS within an octave.
All basic FIFTHS are Perfect except for one. Can you find it? DRAG YOUR MOUSE over the example below to discover which basic FIFTH is not Perfect. HINT: When you turn FOURTHS upside down, you will get FIFTHS.
Perfect FIFTHS contain seven (7) half steps. B to F is six (6) half steps, so that basic FIFTH is a diminished FIFTH.
