IntroductionThere are a variety of diminished guitar chords. These include, diminished (dim), diminished 5th (-5), diminished 7th (о7 or dim 7), half diminished 7th (ø7 or m7b5), 7th diminished 5th (7 -5), 9th diminished 5th (9 -5)...
In this session, we will be looking at the 3-note diminished (dim) chord. Many guitarists prefer to play a diminished 7th chord (4-note chord) instead of a diminished chord... the choice is yours, but they are handy to know.
The diminished chord is a dissonant or unstable chord and generally needs resolution, however, if used cleverly the tension can sound awesome.
- A diminished chord is a diminished triad consisting of 2 minor thirds above the root or tonic, therefore having a root, a minor third, and a diminished 5th.
- The chord formula for a diminished (dim) chord is 1 - ♭3 - ♭5
- The symbol for a diminished chord is dim, º , or m(♭5)
Example: Calculating C diminished... Cdim, Cº or Cm(♭5)
- Diminished Chords consist of the 1st, ♭3rd, and ♭5th notes of a Major Scale
- Remember that a minor third is equal to 3 half steps or 3 semitones. If we move a minor third upwards from C, we get E♭ ...(C - C# - D - E♭). If we move another minor 3rd upwards from E♭, we get G♭...E♭- E - F - G♭)
- 'C' chords, are based on the C major Scale which consists of no sharps or flats.
- The C scale reads as follows: C - D - E - F - G - A - B - C
- Chord formula for a diminished chord = 1 - ♭3 - ♭5
- Substitute the notes of the scale into the formula: 1=C, ♭3=♭E, ♭5=♭G
- C dim reads as follows: C - ♭E - ♭G
Dimimished Chord Charts
Adim - Cdim(A diminished to C diminished)
Adim - Cdim
C#dim / Dbdim - Edim(C# or Db diminished to E diminished)
C#dim / Dbdim - Edim
Fdim - G#dim / Abdim(F diminished to G# or Ab diminished)
Fdim - G#dim / Abdim