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Flat (music)
In music, flat means lower in pitch. It may either be used in a general sense to mean any lowering of pitch, or to specifically refer to lowering pitch by a semitone. A flat is the opposite of a sharp (♯) which indicates a raised pitch in the same way.
The flat symbol (♭) appears in key signatures to indicate which notes are flat throughout a section of music, and also in front of individual notes as an accidental, indicating that the note is flat until the next bar line.
The symbol ♭ is a stylised lowercase b, derived from Italian be molle for "soft B" and German blatt for "planar, dull". It indicates that the note to which it is applied is played one semitone lower. In the standard modern tuning system, 12 tone equal temperament, this corresponds to 100 cents.
In older tuning systems (from the 16th and 17th century), and in modern microtonal tunings, the difference in pitch indicated by a sharp or flat is normally smaller than the standard semitone. For example, in the old quarter-comma meantone system a flat lowers a note's pitch by 76.05 cents,, and in just intonation a flat commonly lowers a note's pitch by 70.57 cents. In Pythagorean tuning a flat lowers the pitch by 113.7 cents, and in well temperaments, a flat may be different sizes. Intricate systems of microtuning may replace the standard flat or sharp with different symbols for raising and lowering pitch. In 53 equal temperament tuning sharps and flats have two or three different sub-levels, and notation for flattening notes varies, but usually involves several different symbols; one of the sets of 53 TET flat symbols is ♭ (67.9 cents), 
(45.3 cents), and ↓ (22.6 cents), used both separately and in combinations.
A double flat (𝄫) lowers a note by two semitones (a whole step).
A quarter-tone flat, half flat or demiflat indicates the use of quarter tones; it may be marked with various symbols including a flat with a slash (
), a flat with a 4 (𝄳),[citation needed] or a reversed flat sign (). A three-quarter-tone flat, flat and a half or sesquiflat is represented by a demiflat and a whole flat (
). The symbols -, ↓, , among others, represent comma flat or eighth-tone flat.
A triple flat (♭𝄫 or 𝄫♭) is very rare. As expected, it lowers a note by three semitones (a whole tone and semitone). (For example, B♭𝄫 is enharmonic with A♭.)
While this system allows for higher multiples of flats, there are only a few examples of triple flats in the literature. However, quadruple flats or beyond may be required in some non-standard tuning systems such as 53 equal temperament. A quadruple flat would be indicated by the symbol 𝄫𝄫.[citation needed]
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Flat (music) AI simulator
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Flat (music)
In music, flat means lower in pitch. It may either be used in a general sense to mean any lowering of pitch, or to specifically refer to lowering pitch by a semitone. A flat is the opposite of a sharp (♯) which indicates a raised pitch in the same way.
The flat symbol (♭) appears in key signatures to indicate which notes are flat throughout a section of music, and also in front of individual notes as an accidental, indicating that the note is flat until the next bar line.
The symbol ♭ is a stylised lowercase b, derived from Italian be molle for "soft B" and German blatt for "planar, dull". It indicates that the note to which it is applied is played one semitone lower. In the standard modern tuning system, 12 tone equal temperament, this corresponds to 100 cents.
In older tuning systems (from the 16th and 17th century), and in modern microtonal tunings, the difference in pitch indicated by a sharp or flat is normally smaller than the standard semitone. For example, in the old quarter-comma meantone system a flat lowers a note's pitch by 76.05 cents,, and in just intonation a flat commonly lowers a note's pitch by 70.57 cents. In Pythagorean tuning a flat lowers the pitch by 113.7 cents, and in well temperaments, a flat may be different sizes. Intricate systems of microtuning may replace the standard flat or sharp with different symbols for raising and lowering pitch. In 53 equal temperament tuning sharps and flats have two or three different sub-levels, and notation for flattening notes varies, but usually involves several different symbols; one of the sets of 53 TET flat symbols is ♭ (67.9 cents), (45.3 cents), and ↓ (22.6 cents), used both separately and in combinations.
A double flat (𝄫) lowers a note by two semitones (a whole step).
A quarter-tone flat, half flat or demiflat indicates the use of quarter tones; it may be marked with various symbols including a flat with a slash (), a flat with a 4 (𝄳),[citation needed] or a reversed flat sign (). A three-quarter-tone flat, flat and a half or sesquiflat is represented by a demiflat and a whole flat (). The symbols -, ↓, , among others, represent comma flat or eighth-tone flat.
A triple flat (♭𝄫 or 𝄫♭) is very rare. As expected, it lowers a note by three semitones (a whole tone and semitone). (For example, B♭𝄫 is enharmonic with A♭.)
While this system allows for higher multiples of flats, there are only a few examples of triple flats in the literature. However, quadruple flats or beyond may be required in some non-standard tuning systems such as 53 equal temperament. A quadruple flat would be indicated by the symbol 𝄫𝄫.[citation needed]