Download this FREE PDF to understand Key Signatures. It’s all about the power of 7. A key signature can only have a total of 7 sharps or 7 flats.
So what are the opposites? We need to understand that C Major has NO sharps and NO flats in it’s key signature…but C# major has 7 sharps AND Cb major has 7 flats.
ok…G major has 1 sharp, therefore Gb major has 6 flats.
D major has 2 sharps, therefore Db major has 5 flats. Watch the video to get a better understanding of this cool rule. But also remember, you need to know the circle of 5ths to know the key names. Sharps: from C…G, D, A, E, B, F#, C# FLATS: F, Bb, Eb, Ab, Db, Gb, Cb. Do you see that the flat key names all have a flat in their name EXCEPT F major. So let me ask you this…if F major as 1 flat…therefore F# major has 6 sharps.
Also KNOW your order of Sharps and Flats. The order NEVER changes for sharps: F, C, G, D, A, E, B. For flats: B, E, A, D, G, C, F…OPPOSITE to the sharps. Watch the video link below to help you better understand.