Music notation glossary · Accidentals
Double flat
two semitones lower
As a Unicode character — to paste into text, spreadsheets or chat. Whether it appears depends on the font.
In the score
What it means
Lowers by a whole tone. In the diminished seventh chord on E flat the top note is B double flat — it sounds like A, but it is a lowered B.
Related pages
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Photograph a page of sheet music or play the melody — Anotona finds the key, engraves the notes and transposes them into any other. Free.
See AnotonaEvery note on this page is computed, not typed in — following the rule that also makes F# major spell its seventh degree E#, not F.