![]() Let’s say you’re composing in the key of Cb major which has seven flats, Cb-Db-Eb-Fb-Gb-Ab-Bb. Here’s a scenario which would require the use of a double flat. Why not F instead of Gbb? This is a question often asked by beginners. What’s the point of a double-flat sign? Why not just write C? Why write Dbb. Go down by one more semitone and you end up on a black key. This is because Cb points to the natural key B, and Fb points to the natural key, E. The other exception is Fbb which corresponds to Eb, a black key on your piano. In most instances, when you come across a double flat sign, you are to play a white key. Enharmonic notes are notes with different names but played with the same key. Gbb is the enharmonic equivalent of F, and so on. So Dbb is the equivalent of C on your piano. This simply means that you are to play the key which is two semitones lower. Let’s say you come across a D note in a piece of music but there is a double flat symbol before it. In music notation, this symbol is placed before a note, like other accidentals. In type it is written like this: bb, for example Dbb. ![]() Highly Recommended: Click here for one of the BEST piano/keyboard courses I’ve seen online. It is the equivalent of two flats, and lowers a note’s pitch by two half steps or semitones. The double-flat is the opposite of the double sharp. We have already talked about the other accidental signs, namely, the sharp sign, flat sign and double sharp sign. Let’s now take a look at the double flat sign.
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