#1
Hi guys, I've been learning some theory lately and I've come across the circle of fifths, which I heard of before, but I've also seen the circle of fourths? I was wondering what is the difference etc.

Thanks!
#2
They're the same thing, going one way yields the cycle of fifths. Going the other way is the cycle of fourths.
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#3
circle of fifths for sharp keys,, circle of fourth for flat keys
But this goes up to 11
#4
Learn the circle. Learn it backwards. Write it out in both directions. Think about it in your sleep.
Practice everything you do in all keys going in both directions around the circle.
It is the secret code behind everything you hear.