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Re: Chord naming conventions (was: triangle chord notation)


From: Paul Scott
Subject: Re: Chord naming conventions (was: triangle chord notation)
Date: Sat, 12 Aug 2006 02:41:20 -0700
User-agent: Thunderbird 1.5.0.4 (X11/20060713)

Andre Schnoor wrote:
Er, no. These are three distinctive chords:

Xdim         = 1, b3, b5
Xm.dim7    = 1, b3, b5, b7
Xdim7        = 1, 3, b5, b7

One may argue that "m.dim7" is a weird exception in that is uses that fancy dot. Alternatively "X(b5,b7)" would be more precise, but nobody uses that in practice. This chord, BTW, is used frequently in classical music. It is symmterical, such that, for example in 12TET tuning

    Cm.dim 7 = Ebm.dim7 = Gbm.dim7 = Am.dim7
That chord is the one written Xdim7 in both classical and jazz.

The chord you write Xdim7 = 1, 3, b5, b7 where your b7 is ambiguous (is it a minor seventh or a diminished seventh) by your notation must have a major third on the bottom making it some kind of major or dominant chord. Maybe it would be better if you would use example notes like:

Cm7(-5) = C, Eb, Gb, Bb (also called half diminished) (also written with a small circle with a slash) Cdim7 = C, Eb, Gb, Bbb (also called fully diminished) (also written with a small circle)



In any case, this chord is important.
It certainly is and it is written dim7 not m.dim7.

Paul Scott





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