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In page Flat (music):

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  • In environments where the double flat symbol is not supported, or in specific text notation, a double flat can be written as , two lower-case b's (bb), etc. Likewise, a triple flat can also be written as , etc.[citation needed]
  • In environments where the half flat or 𝄳 symbol is not supported, or in specific text notation, a half flat can be written as d, etc. Likewise, a flat and a half can also be written as d♭, db, etc.[citation needed]
  • To allow extended just intonation, composer Ben Johnston uses a flat as an accidental to indicate a note is lowered 70.6 cents.[2]