Circle of Fifths

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What is Circle of Fifths?

The Circle of Fifths is a way to remember the order of flats and sharps in key signatures.

As you ascend in fifths (clockwise), key signatures get one degree “sharper.” (CC to GG is a fifth because CC=1, DD=2, EE=3, FF=4, and GG=5.) As you descend in fifths (counterclockwise), key signatures get one degree “flatter.”