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This works because diminished seventh chords are structurally equivalent in all of their inversions (a stack of minor thirds), so any note in a diminished seventh chord can be seen as the root note. The most important irregular resolution is the deceptive cadence , [ 3 ] most commonly V 7 –vi in major or V 7 –VI in minor.
In this role, a diminished seventh chord resolves to a major or dominant seventh chord whose root is one of the notes of the diminished seventh chord (common tone), the most common being the raised supertonic seventh, which resolves to the tonic in major keys (♯ ii o 7 –I, shown below) and the raised submediant, which resolves to dominant ...
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.
That is, the implied seventh chord is a dominant seventh, i.e. a major triad plus the minor seventh, to which the ninth is added: e.g., a C 9 consists of C, E, G, B ♭ and D. C dominant ninth (C 9) would usually be expected to resolve to an F major chord (the implied key, C being the dominant of F).
In dominant function, the VII half diminished chord, like its fully diminished counterpart, can take the place of the dominant V chord at a point of cadential motion. This chord, sometimes called a leading-tone diminished seventh chord , is represented by the Roman numeral notation vii ø 7 , the root of which is the leading-tone to the tonic ...
Because of their symmetry, secondary leading-tone diminished seventh chords are also useful for modulation; all four notes may be considered the root of any diminished seventh chord. They may resolve to these major or minor diatonic triads: [22] In major keys: ii, iii, IV, V, vi In minor keys: III, iv, V, VI
A diminished seventh chord may resolve to a chord whose root is common to both chords (e.g. ♯ ii o 7 resolves to I 6). When this happens, the first chord is called a common-tone diminished seventh chord.
The chord notation N.C. indicates the musician should play no chord. The duration of this symbol follows the same rules as a regular chord symbol. This is used by composers and songwriters to indicate that the chord-playing musicians (guitar, keyboard, etc.) and the bass player should stop accompanying for the length covered by the "No Chord ...