Flat (music)

In music, flat means lower in pitch. It may either be used generically, meaning any lowering of pitch, or refer to a particular size: lowering pitch by a chromatic semitone. A flat is the opposite of a sharp (♯) which raises pitch by the same amount that a flat lowers it.

♭
Flat (music)
In Unicode	U+266D ♭ MUSIC FLAT SIGN (♭)
Different from
Different from	U+0062 b LATIN SMALL LETTER B
Related
See also	U+1D12B MUSICAL SYMBOL DOUBLE FLAT U+266F ♯ MUSIC SHARP SIGN

The flat symbol (♭) is used in two ways: It is placed in key signatures to mark lines whose notes are flattened throughout that section of music; it may also be an "accidental" that precedes an individual note and indicates that the note should be lowered temporarily, until the following bar line.