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QUESTION! More Diminished Chords.

Vussel Riste

New Student
Nov 11, 2019
10
0
  • #1
    So I originally learned the Diminished Chord formula as:
    I-ii-Vdim-VI
    Then another source tells me, its just: I-ii-Vdim.
    But then the “minor chord with a flat 5 and flat 7” comes around which looks like a diminished chord with a flat 7.
    I don’t know which is which, unless I’m missing something here.
    Can someone explain?
    Thanks!
     

    idssdi

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  • #2
    Basically a diminished chord is 4 minor thirds stacked upon each other. The chord formula would be 1 b3 b5 bb7. Playing these intervals together will make up a diminished chords. Than you have the half-diminised chord which has formula 1 b3 b5 b7. Be wary that a half-diminised chord can also function as a minor 6 chord(i.e. B half-diminished is the same as Dm6).
    Also I have a question about your notation. As far as my knowledge goes Roman numerals are used to show harmony. So they show a chord progression and don’t function as a chord formula. Vdim really means the V chord is a diminished chord in your progression(which seems pretty weird for me since the V chord is a dominant chord)
     

    Vussel Riste

    New Student
    Nov 11, 2019
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    0
  • #3
    According to the books I use:
    -The Roman Numerals provide a shorthand notation to talk about all 12 notes in the Western 12-tone scale.
    -Its a relative system of notation: The I or root can be any note.
    -The capitalized Roman Numerals are the notes in the Major Scale.
    -The other 5 notes have Roman numbers and names that describe their relative location.
     

    idssdi

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  • #5
    Roman numerals really are chords. That’s why an uppercase is major and a lowercase is minor. A note on his own has no such thing as a minor note or a major note because what makes a note minor or major is it’s relation to another note(i.e. minor and major thirds etc.)
    https://study.com/academy/lesson/roman-numeral-notation-in-music-theory.html
     

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