Fouks
Registered User
Join date: Apr 2009
277 IQ
Hello.

Im starting to understand how intervals work, but i really can't figure out the meaning of inversions.

I know that a perfect inverts to a perfect, minor to major etc. But let's say that i have a perfect fourth (in the scale of C) which is an F and it then inverts to a perfect fifth which is a G. Can i play these two notes together on the guitar and they will be a perfect fifth, or how does it work?
chronowarp
Registered User
Join date: Feb 2012
43 IQ
When you invert an interval, you change the quality.

The interval is dictated by the relationship of the top note to the bottom.

If you play a C-G, it's a fifth. It sounds as a fifth, and the relationship is a fifth.
If you flip it to G-C, it's a fourth. It sounds as a fourth, the relationship is a fourth.

The concept of inverting intervals is primarily for understanding and realizing symmetry and as a tool for organizing and memorizing intervals.
Last edited by chronowarp at Dec 27, 2012,
Join date: Jun 2008
640 IQ
An inverstion is when you take one of the notes and move it to the otherside of the other note by an octave to create a new interval.

That might sound confusing so if you have C up to F then to invert that interval you would take the C and move it up an octave to the other side of the F. Then you would have F up to C.

Alternatively you could take the F on that original C up to F interval and move it down an octave to the other side of the C. The result would be F up to C (or C down to F).

Note that C up to F is a perfect fourth. But an interval from F up to C is a perfect fifth.

You can do this with any interval.

So with A and C: A up to C is a minor third and is the same as C down to A. The inversion of this is A down to C (or C up to A) which is a Major sixth.
Si
jazz_rock_feel
UG Resident
Join date: Jun 2006
2,342 IQ
An interval is two notes. I think you're confusing scale degrees and intervals.

C-F is an interval (a perfect 4th). If you invert it to F-C you get a perfect fifth.
B-D (minor 3rd) inverts to D-B (major 6th)
A-Eb (diminished 5th) inverts to Eb-A (augmented 4th)
I don't know what music theory is.

mdc
UG's Mr Chord Man
Join date: Feb 2008
722 IQ
Quote by 20Tigers
Note that C up to F is a perfect fifth. But an interval from F up to C is a perfect fourth.

Typo?
Fouks
Registered User
Join date: Apr 2009
277 IQ
Ahh, that made everything clear. Thank you guys.
Join date: Jun 2008
640 IQ
Quote by mdc
Typo?

oops - thanks, -fixed.
Si