Diminished triad
Two minor thirds above the root / From Wikipedia, the free encyclopedia
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In music theory, a diminished triad (also known as the minor flatted fifth[citation needed]) is a triad consisting of two minor thirds above the root.[3] It is a minor triad with a lowered (flattened) fifth. When using chord symbols, it may be indicated by the symbols "dim", "o", "m♭5", or "MI(♭5)".[4] However, in most popular-music chord books, the symbol "dim" and "o" represents a diminished seventh chord (a four-tone chord), which in some modern jazz books and music theory books is represented by the "dim7" or "o7" symbols.
Component intervals from root | |
---|---|
diminished fifth (tritone) | |
minor third | |
root | |
Tuning | |
45:54:64;[1] 54:45=6:5 & 64:45[2] | |
Forte no. / | |
3-10 / |
For example, the diminished triad built on B, written as Bo, has pitches B-D-F:
The chord can be represented by the integer notation {0, 3, 6}.
In the common practice period, the diminished triad is considered dissonant because of the diminished fifth (or tritone).