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Topic: diminished chords  (Read 1206 times)

Offline mmmaestro007

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diminished chords
on: May 13, 2006, 03:45:14 AM
hi all,
this is my post and i am wondering if anyone can explain this:
every day i try to practice either maj7,dom7,m7,half dim or dim chords in drop two around the circle of fifths in all inversions
today was dim's turn and as i started going through, i thought i heard something going on other than the obvious
so i went through them in close position i disovered each change is just moving up chromatically
if you start with a Cdim chord-C,E flat, Gflat and A and if you move each note up a semitone you have D flat,E,G and B flat- ie. a Gdim chord
not sure what this means or the theory behind it or if it can be applied to improve playing
conversely descending in semitones would be moving in fourths
any ideas?
thanks :)

Offline nicco

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"Without music, life would be a mistake." - Friedrich Nietzsche

Offline daniloperusina

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Re: diminished chords
Reply #2 on: May 13, 2006, 08:56:02 AM
A diminished seventh chord consists of four notes, each a minor third apart. If you'd continue building minor thirds on your example; c-eb-gb-a, you'd be back to your starting note, c-eb-gb-a-c-eb etc.

On the keyboard there are only three possible combinations:
c-eb-gb-a
db-e-g-bb
d-f-ab-b

because the next step would have the same notes as the first one.

In music therory, though, there are more variants.
c-eb-gb-a = c-d#-f#-a
same keys on the keyboard, but NOT the same chord in theory.

Actually it works as a dominant seventh chord, but it doesn't resolve into only one chord, but to four! (actually eight, if you count major/minor).

This is a way to keep in mind which are those eight chords it can resolve into:
c-d#-f#-a; view each note as a 7th in a dominant seventh. That gives you four "hidden" dominant 7ths:
D7; F7; Ab7; B7
resolving into
G, Gm; Bb, Bbm; Db, Dbm; E, Em


The name, dim, is an abbreviation of "diminished 7th". Sometimes it's also referred to as "dominant seventh with flatted ninth without the root". Explainable like this: B7 is a dominant seventh;
B-D#-F#-A
the ninth is C#, flatted becomes C
exclude the root note, B, and you'll get
D#-F#-A-C

Offline rlefebvr

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Re: diminished chords
Reply #3 on: May 13, 2006, 06:40:39 PM
What he said...

So basically you only have 3 to learn with the inversions.

However, the best and easiest way I believe is to simply learn to visualise the hand positions since each chord is a third up.

C to eB is 3 half steps.
Eb to Gb is 3 half steps
Gb to A is 3 half steps.

So just play the base chord on the circle of fifth and visualise 3 half steps for each other fingers. It goes rather quickly.
Ron Lefebvre

 Ron Lefebvre Copyright. Any reproduction of all or part of this post is sheer stupidity.

Offline mmmaestro007

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Re: diminished chords
Reply #4 on: May 14, 2006, 02:52:47 AM
thanks guy's :)
 

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