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OfflineFocusHawaii
Keeper of theMagic Garden

Registered: 12/27/02
Posts: 1,013
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Last seen: 6 years, 9 months
Diminished Sevenths
    #3104317 - 09/07/04 06:49 PM (13 years, 9 months ago)

Anybody know the theory behind this? I've looked but haven't been able to scrounge up anything conclusive. What are the intervals, 1 b3 b5 b7? What mode does it resemble? Ahh, so many questions!


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OfflineHarbinger
The Power of theRiff Compels Me

Registered: 08/12/03
Posts: 2,059
Loc: Far Away
Last seen: 9 years, 3 months
Re: Diminished Sevenths [Re: FocusHawaii]
    #3104593 - 09/07/04 07:29 PM (13 years, 9 months ago)

I know there are 9 half steps in it, A to F# for example, but other then that I don't know anything else


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OfflineBlastrid
e l e m e n t al i t y
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Re: Diminished Sevenths [Re: FocusHawaii] * 1
    #3104994 - 09/07/04 08:43 PM (13 years, 9 months ago)

There are 2 kinds of diminished 7ths. a half diminished, indicated by a circle with a line thru it, and a fully diminished, which is just a circle.
-The half diminished 7th chord has a diminished triad(minor 3rd, flat 5) with a minor 7th.
-The fully diminished 7th chord has a diminished triad with a diminished 7th (1 half step lower than a minor 7th).

In root position:

diminished 7th (or minor 7th for a half diminished chord)
flat 5th
minor 3rd
root

So, an A fully diminished 7th chord would be A,C,Eb,Gb.

A diminished chord traditionally acts as a leading chord to the tonic or dominant. So a B diminished 7th chord would be B,D,F,Ab, resolving to a C Major chord. Functionally, the Bo7 chord would be a vii diminished7.

Some interesting facts about diminished chords:
A diminished 7th chord equally divides the octave. (the only other chord to do this is an Aug6 chord). This means between every note is a minor third. This also means that every inversion can be a root position, since every interval is the same.
The first chord to be used in parallel motion (since that was taboo for hundreds of years), by Beethoven.

I hope this all makes sense to you... please lemme know if there's anything I can make more clear. :smile:


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Blas'?trid (bl?s tr?d)
    n.  3rd generation derivitave of a combination of 'bastard' and 'blasted'.  Used as both an insult or an expletive.
    ex.  Blastrid!

Stereopattern  <--My music.


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OfflineFocusHawaii
Keeper of theMagic Garden

Registered: 12/27/02
Posts: 1,013
Loc: Canada
Last seen: 6 years, 9 months
Re: Diminished Sevenths [Re: Blastrid]
    #3106268 - 09/08/04 12:56 AM (13 years, 9 months ago)

Beautiful Blastrid. More than enough on there!


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