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The chromatic expansion of tonality which characterizes much of nineteenth century music is illustrated in miniature by the substitution of a chromatic harmony for an expected diatonic harmony. This technique resembles the deceptive cadence, which involves the substitution of another diatonic chord for the expected diatonic goal harmony.
In simple terms, within each octave, diatonic music uses only seven different notes, rather than the twelve available on a standard piano keyboard. Music is chromatic when it uses more than just these seven notes. Chromaticism is in contrast or addition to tonality or diatonicism and modality (the major and minor, or "white key", scales ...
In tonal music, chord progressions have the function of either establishing or otherwise contradicting a tonality, the technical name for what is commonly understood as the "key" of a song or piece. Chord progressions, such as the extremely common chord progression I-V-vi-IV, are usually expressed by Roman numerals in
In music theory a diatonic scale is a heptatonic (seven-note) scale that includes five whole steps (whole tones) and two half steps (semitones) in each octave, in which the two half steps are separated from each other by either two or three whole steps. In other words, the half steps are maximally separated from each other.
A sequence can be described according to its direction (ascending or descending in pitch) and its adherence to the diatonic scale—that is, the sequence is diatonic if the pitches remain within the scale, or chromatic (or non-diatonic) if pitches outside of the diatonic scale are used and especially if all pitches are shifted by exactly the ...
A diatonic passing chord may be inserted into a pre-existing progression that moves by a major or minor third in order to create more movement." [4] "'Inbetween chords' that help you get from one chord to another are called passing chords." [5] For example, in the simple chord progression in the key of C Major, which goes from Imaj7/iii7/ii7/V7 ...
The diatonic genus is composed of tones and semitones, the chromatic genus is composed of semitones and a minor third, the enharmonic genus consists of a major third and two quarter-tones or diesis. [16] Within these basic forms, the intervals of the chromatic and diatonic genera were varied further by three and two "shades" (chroai ...
[17] The usual practice is to derive the circle of fifths progression from the seven tones of the diatonic scale, rather from the full range of twelve tones present in the chromatic scale. In this diatonic version of the circle, one of the fifths is not a true fifth: it is a tritone (or a diminished fifth), e.g. between F and B in the "natural ...