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F Sharp notes. F ♯ (F-sharp; also known as fa dièse or fi) is the seventh semitone of the solfège. It lies a chromatic semitone above F and a diatonic semitone below G, thus being enharmonic to sol bémol or G ♭ (G-flat) in 12 equal temperament. However, in other temperaments, such as quarter-comma meantone, it is not the same as G ♭.
F-sharp major is the key of the minuets in Haydn's "Farewell" Symphony and of the String Quartet No. 5 from his Op. 76, of Beethoven's Piano Sonata No. 24, Op. 78, Verdi's "Va, pensiero" from Nabucco, Mahler's unfinished Tenth Symphony, Korngold's Symphony Op. 40, and Scriabin's Fourth Piano Sonata.
F-sharp minor is sometimes used as the parallel minor of G-flat major, especially since G-flat major's real parallel minor, G-flat minor, would have nine flats including two double-flats. For example, in the middle section of his seventh Humoresque in G-flat major , Antonín Dvořák switches from G-flat major to F-sharp minor for the middle ...
Notes that are shown as sharp or flat in a key signature will be played that way in every octave—e.g., a key signature with a B ♭ indicates that every B is played as a B ♭. A key signature indicates the prevailing key of the music and eliminates the need to use accidentals for the notes that are always flat or sharp in that key. A key ...
The sharp symbol is used in key signatures or as an accidental applied to a single note. The staff below has a key signature with three sharps (A major or its relative minor, F ♯ minor). The sharp symbol placed on the note indicates that it is an A ♯ instead of an A ♮.
For example, A-minor is "Am" and D-sharp minor is "D ♯ m"). The small interval between equivalent notes, such as F-sharp and G-flat, is the Pythagorean comma . Minor scales start with , major scales start with .
Notes that do not meet that criterion are called chromatic notes or accidentals. Accidental symbols visually communicate a modification of a note's pitch from its tonal context. Most commonly, [note 2] the sharp symbol (♯) raises a note by a half step, while the flat symbol (♭) lowers a note by a half step.
Cross-note A: E-A-E-A-C-E Alternative: E-A-C-E-A-E [16] [17] Cross-note C: C-G-C-G-C-E ♭ C-C-G-C-E ♭-G, a cross-note overtones tuning; C-C-G-C-E ♭-A ♭ a cross-note overtones tuning that facilitates seventh chords. Cross-note D: D-A-D-F-A-D (used by John Fahey on the song "Red Pony") Alternative: D-A-D-A-D-F (used by William Ackerman on ...