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Ricardo -> RE: Now I know what Conde's are for! (Mar. 2 2010 19:43:13)
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quote:
ORIGINAL: Estevan
quote:
D#dim7 is a better.
Not better; equally good/possible. That's the thing with diminished seventh chords, taken out of context there's no way of knowing because any of the four notes could be the root, and you can't say what key it's in without seeing how it resolves or how it's spelled. And I doubt that Willie spells these things.
[N.B. I am not a nerd. That's just the way it is with dim7 chords.]
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Good point![:)]
OK nerd mode back on:
It's just a little pet peeve of mine, there is a subtle logic to spelling chords and scales correctly, because of how they relate to the circle of 5ths. I have no probs with the chord in question being spelled A dim7/Eb (key of Bb minor), B#dim7/D# (key of C#m), F#dim7/Eb (key of Gminor), in addition to simply D#dim7.
The enharmonic equivalents (Bbb or Gx, C, Gb, or Ebdim7 respectively) are all based on non practical, or non realistic "theoretical" keys or scales. (that is harmonic minor scales as those are where the chords would have been constructed from).
The whole/half symmetric scale also allows this chord to exist, but is a non key specific scale that has 8 notes, meaning you can't really define it by a key signature and you will inevitably have to spell it with one of the 7 note names twice. Same deal with chromatic scale, obviously.
Jason was correct that Ebdim7 will pop up when reading jazz charts or pop charts, as chord charts are used to make sight reading and comping harmony easier. In addition, jazz charts often don't use key signatures. When it comes to improvising over a chart, the idea is to treat each individual chord as a separate entity with it's own key/mode/scale options, separate from the song as a whole. Example:
Remember Ebdim7 is spelled Eb-Gb-Bb-Dbb.....
Cm7,Dm7, Ebdim7, Gm7.... should have been spelled F#dim7/Eb, but easier to read the voicing....also:
Bbmaj7, Bdim7, Cm7, Ebdim7.... should be Adim7/Eb....borrowed from Bbminor....and:
Bbm7, Bb7, Ebm7, Ebdim7, F7, Bbm7..... same should have been Adim7.....
Dmaj7,Ebdim7, Em7, A7, Dmaj7 etc.... should have been D#dim7.
So enharmonic misspellings often make for a cleaner chart to read and solo over.
nerd mode off:
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