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This triad is consequently called the supertonic diminished triad. Like the supertonic minor triad found in a major key, the supertonic diminished triad has a predominant function, almost always resolving to a dominant functioning chord. [7] If the music is in a minor key, diminished triads can also be found on the raised seventh note, ♯ vii o.
The diminished triad also contains a tritone in its construction, deriving its name from the diminished-fifth interval (i.e. a tritone). The half-diminished seventh chord contains the same tritone, while the fully diminished seventh chord is made up of two superposed tritones a minor third apart.
minor triads contain a minor third with a major third stacked above it, e.g., in the minor triad A–C–E (A minor), A–C is a minor third and C–E is a major third. diminished triads contain two minor thirds stacked, e.g., B–D–F (B diminished) augmented triads contain two major thirds stacked, e.g., D–F ♯ –A ♯ (D augmented).
In classical music from Western culture, a diminished third (Play ⓘ) is the musical interval produced by narrowing a minor third by a chromatic semitone. [ 1 ] [ 4 ] For instance, the interval from A to C is a minor third, three semitones wide, and both the intervals from A ♯ to C, and from A to C ♭ are diminished thirds, two semitones wide.
The Locrian mode is the only modern diatonic mode in which the tonic triad is a diminished chord (flattened fifth), which is considered very dissonant. This is because the interval between the root and fifth of the chord is a diminished fifth. For example, the tonic triad of B Locrian is made from the notes B, D, F. The root is B and the dim ...
A diminished triad with a minor seventh is a half-diminished chord, usually notated either Cm 7(♭ 5) or C ø7. A diminished triad played over a root a major third away creates a Dominant 7th chord, notated C 7, with a C Major triad on the bottom, and an E° from the chord third of C (C E G B ♭). A minor third below would give a fully ...
The diminished triad can be used to substitute for the dominant seventh chord. In major scales, a diminished triad occurs only on the seventh scale degree. For instance, in the key of C, this is a B diminished triad (B, D, F). Since the triad is built on the seventh scale degree, it is also called the leading-tone triad.
Instead, it means a diminished triad plus a diminished seventh. To make this distinction clear, the term "half-diminished" and the ø symbol (ø) were invented. Since the term dim 7 (as in Bdim 7 ) meant something else, the accurate but unwieldy term "minor seventh flat five" (as in B ø 7 ) came to be used.