Major Scale Formation

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by Papu Gohain
(Guwahati, Assam, India)F sharp major scale on piano

In F# major Scale, 7th note is F. And it is not a Sharp note, then why we choose F note as E# note.
If it goes like this then in C major scale why we don’t consider “c” note as ‘B#’ or the note F as ‘E#”?

(Major Scale Formation) Answered by Mantius Cazaubon:

Great question, Papu Gohain. The answer is this. For every major scale, you can only use a letter of the musical alphabet once, and you must use every one of the seven letters, A-B-C-D-E-F-G. For the F# major scale, the reason we say E# instead of F is we have already used the letter, F in F#. Therefore we cannot use F again. We have to use E. E has to be included. It’s a must.
C major scale on piano
In the C major scale, we cannot say B# since we have already used B. And since it is the C major scale, the note has to be C and not B# anyway. It’s the same for the note F. We cannot use E twice and say E#. Furthermore there are no sharps in the C major scale as the key signature (in music notation) would suggest.

If you look at any major scale, you will notice that each letter is used only once.

One more thing: any key on your piano can be sharp or flat. There is a misconception that the white keys are natural and that the black keys are sharp or flat. The black keys always play sharp or flat notes but white keys can do that as well.

All the best and hope this helps. Keep asking questions and I will gladly answer.

Mantius Cazaubon

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