RE: [Harp-L] Why use the term "perfect" to describe a perfect fourth ora perfect fifth?

[Michael Peloquin <peloquinharp@xxxxxxxxxxx>]

The way I learned and always looked at it:
The rule of 9 applies to inversions -- adds up to 9 and flips major to minor, minor to major, aug to dim, dim to aug, and perfect to perfect:
Maj 2 < > min 7
min 3< > Maj 6
P4 < > P5
Aug 4 < > Dim 5
 
Unison and Octaves are also considered perfect for the above reasons.
as always, if we say it and play it, we will KNOW it-
!PuRrFEk-t!
 


 
Michael Peloquin
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 > From: jphillips@xxxxxxxxxxxxxxxx

> In addition to John's definition, there are some interesting
> characteristics of the perfect interval. When inverted the interval
> remains perfect, unlike the behavior of the major, minor, augmented and
> diminished intervals. Raised a half step, a perfect interval becomes
> augmented, as a major interval does. Lowered a half step, it becomes
> diminished, as a minor interval does. But the behavior of the major and
> minor are not similarly symmetrical. 
> 
> -----Original Message-----
> From: Michael Rubin 
> A student wants to know and so do I.
> Thanks,
> Michael Rubin
> Michaelrubinharmonica.com