Theory question help

Discussion in 'General Instruction [BG]' started by bassgirl4, Apr 14, 2012.

  1. bassgirl4

    bassgirl4 Guest

    Apr 14, 2012
    i'm trying to write a song and i want to use a diminished 7th chord. What chord in the key would i use if i was in the key of Dm?

    Also if i were to use tritone substitution what chord would i use in Dm?

  2. bassgirl4

    bassgirl4 Guest

    Apr 14, 2012
    Also what is the secondary dominant you would use in Dm7
  3. onda'bass

    onda'bass Supporting Member

    Sep 5, 2010
    Buffalo Ny
    Diminished chords are not in the key, so either it is used in chromatic passing EX:(cmaj- C#dim-Dmin), or played over a dominant or secondary dominant. There are many secondary Dominants, so depends v/I v/ii v/iii v/iv v/v v/vi v/vii are all of your choices just depends where you are going.
  4. bassgirl4

    bassgirl4 Guest

    Apr 14, 2012
    ok cheers
  5. The diminished chord in the key of Dm is the iidim or the Em7b5 chord. Chords In The Key Of D Minor.

    You may want to bookmark that list of keys.
  6. Adam Furay

    Adam Furay Guest

    Aug 16, 2011
    Columbus, Ohio
    diminished chords exist naturally in Major keys as the vii chord, and in minor keys as the ii and raised vii chord.


    Key of D minor: ii=Emi7(b5), vii=C#dim7
    Key of C Major: vii=Bmi7(b5)

    secondary dominants can be built on fifth or one fourth lower than any note in a key.

    Key of C: D7 (secondary dominant of G or V), E7(secondary dominant of A or vi)

    Tritone substitutions are dominant chords placed one titone away from any dominant or secondary dominant.

    Key of C: Db7(Tritone sub of the dominant chord G7), Bb7(Tritone sub of the secondary dominant chord E7)