1) Each Letter Name (A, B, C, D, E, F, G) is Used Once and Only Once
2) Sharps of Flats are used as Required to Produce the Correct Sequence of Half and Whole Steps = W W H W W W H (for Major) or W H W W W H W (for Minor)
– It’s been this Way for Hundreds of Years
– It also just makes things Neater when Writing out the Names of the Notes, like Take For Example the Notes in the A Major Scale:
A B C# D E# F# G# A
By using all sharps it makes the scale look neater, now lets try the same scale but with flats instead:
A B Db D F Gb Ab A
When looking at the two scales, which is nicer to look at and easier to understand?
The same can apply for a scale containing flats, lets look at the Db Major Scale:
Db Eb F Gb Ab Bb C Db
And now with sharps instead of flats:
C# D# F F# G# A# C C#
– if you working a C Major scale for example and you use the D chord (2nd interval) – although you still work in C, you have to reference the notes that make that Chord to the D Major Scale and think in D Major in Scale (or E you reference to the E Major scale)
– Always Figure Out if a Certain Note Exists in the Scale or Not
– that´s When we Work with Harmony (Scale-Wise), the 5th Note is the Magic Number (where 3 is “Only” Determine if Major or Minor)
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