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In music theory, a distinction is made [7] between a diatonic semitone, or minor second (an interval encompassing two different staff positions, e.g. from C to D ♭) and a chromatic semitone or augmented unison (an interval between two notes at the same staff position, e.g. from C to C ♯).
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.
Melodies can be based on a diatonic scale and maintain its tonal characteristics but contain many accidentals, up to all twelve tones of the chromatic scale, such as the opening of Henry Purcell's "Thy Hand, Belinda" from Dido and Aeneas (1689) with figured bass), which features eleven of twelve pitches while chromatically descending by half steps, [1] the missing pitch being sung later.
In music theory, an interval is a difference in pitch between two sounds. [1] ... diatonic semitone, major semitone: limma (256:243) augmented unison or augmented ...
D ♭ (D-flat) is a musical note lying a diatonic semitone above C and a chromatic semitone below D. It is thus enharmonic to C ♯. In the French solfège it is known as re bémol. It is the second semitone of the solfège.
Thus, S is the greater semitone, and X is the lesser one. S is commonly called the diatonic semitone (or minor second), while X is called the chromatic semitone (or augmented unison). The sizes of S and X can be compared to the just intonated ratio 18:17 which is 99.0 cents. S deviates from it by +18.2 cents, and X by −22.9 cents. These two ...
E is the third note and the fifth semitone of the C major scale, and mi in fixed-do solfège.It has enharmonic equivalents of F♭ [(F-flat) which is by definition a diatonic semitone above E ♭] and D (D-double sharp), amongst others.
A ♭ (A-flat; also called la bémol) is the ninth semitone of the solfège.. It lies a diatonic semitone above G and a chromatic semitone below A, thus being enharmonic to G ♯, even though in some musical tunings, A ♭ will have a different sounding pitch than G ♯.