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However, in most popular-music chord books, the symbol "dim" or "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 "o 7" symbols. For example, the diminished triad built on B, written as B o, has pitches B-D-F:
In most genres of popular music, including jazz, pop, and rock, a chord name and its corresponding symbol typically indicate one or more of the following: the root note (e.g. C ♯) the chord quality (e.g. minor or lowercase m, or the symbols o or + for diminished and augmented chords, respectively; chord quality is usually omitted for major ...
Half-diminished seventh chord on C (Play ⓘ). 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 ...
Diminished seventh chords may also be rooted on scale degrees other than the leading-tone, either as secondary function chords temporarily borrowed from other keys, or as appoggiatura chords: a chord rooted on the raised second scale degree (D ♯ –F ♯ –A–C in the key of C) acts as an appoggiatura to the tonic (C major) chord, and one ...
Diminished major seventh chords are very dissonant, containing the dissonant intervals of the tritone and the major seventh.They are frequently encountered, especially in jazz, as a diminished seventh chord with an appoggiatura [citation needed], especially when the melody has the leading note of the given chord: the ability to resolve this dissonance smoothly to a diatonic triad with the same ...
Musical Symbols is a Unicode block containing characters for representing modern musical notation. Fonts that support it include Bravura, Euterpe, FreeSerif, ...
The half-diminished seventh chord is frequently used in passages that convey heightened emotion. For example, the "mournful affect" [5] of the sombre opening Chorus of J. S. Bach's St Matthew Passion (1727) features the chord on the seventh beat of its first bar and on the first beat of its third bar:
The letter "Ø" is also used in written music, especially jazz, to type an ad-hoc chord symbol for a half-diminished chord, as in "Cø". The typographically correct chord symbol is spelled with the root name, followed by a slashed degree symbol, as in "C𝆩".