I have played drums and guitar for 25 years and never “got into” music theory. I know what sounds good and play that but I never learned the names or theory behind it.
Why is a 5th not 5 notes apart? On a keyboard it’s any where from 4 white keysto 8 total keys? Why is there not uniformity or consistency?
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It is usually much easier to explain music theory on a guitar. On a guitar a fifth is always eight frets higher. And that is the same for a piano, it is eight keys up. The reason it is called a fifth is because it is five notes up. On a regular piano the notes on the C-major scale or A-minor scale is white and the others black. So if you start with a C and want the fifth you count up from C being 1 and end up on G being 5 which is the fifth.
However say you start with A#. So you start counting A# is 1, C is 2 because that is the next note in the A#-major scale, you skip B because it is not in the A#-major scale. D is 3, D# is 4 as this is the next note in the scale. Then you skip E so F is 5. That means that F is the fifth note up from A#. You can use the minor scale as well if you want, for fifth it does not matter but for third it does.
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