Carrying on from the last post. I'll now do the same for Flat keys. No idea why it's really called the Circle of fifths because that only really works for sharp keys. Flat keys could be called the circle of fourths. You'll see why in a sec.
So using similar logic to the circle of fifths if you take the notes of the C Major scale, BUT stop at the fourth note rather than the fifth.
1 = C
2 = D
3 = E
4 = F
You get F Major. So what's the key signature for that. Well sticking with the number four. If you write out the scale of F Major but FLATTEN the fourth note you get.
1 = F
2 = G
3 = A
4 = Bb (remember flatten the fourth note)
5 = C
6 = D
7 = E
8 = F
So the key of F Major as one flat which is Bb.
Again as you can see the fourth note of F Major is Bb so lets start with that.
1 = Bb
2 = C
3 = D
4 = Eb (remember you have to flatten the fourth note)
5 = F
6 = G
7 = A
8 = Bb
So the key of Bb has two flats in it Bb and Eb
Back to you all, I'm sure you can work the rest out.
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This theory blog is currently being replaced with a structured theory section. In the meantime you might find some duplication so apologies in advance for that.