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Fundamentals of Music Theory |
Descending Perfect Intervals
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To construct a Perfect 4th below a B, first construct a generic
4th:
Now adjust the accidental of the bottom note, until the top note
is part of the Major scale built off of the bottom note. If we try
an F Major scale:
We see that B is not part of the scale, but Bb (a chromatic half
step too low!) is. So, if we raise the F a chromatic half step,
we're all set!
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Try constructing some descending perfect intervals from the
given note. First construct the generic interval, and then adjust
the accidental of the bottom note. |
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Speed Tip: If you were paying close attention to the last two drills, you might have noticed a trend. Both notes of a perfect interval will always have the same accidental, unless the notes are F and B! |
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Try constructing some intervals above or below the given note, and see if you can increase your speed using the Speed Tip above:
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Next Page: Not-So-Perfect Intervals