Enharmonic Note Names for the White Keys that have no Black Key between them. We'll see how these additional Note Names work by looking at the Cb & C# Major Scales.
Enharmonic Note Names on White Keys
Until now, only the black keys with more than one note name were called Enharmonic Notes. For example, add a sharp to C and it becomes C#. Add a flat to D and it becomes Db. Two different note names for this same key. Enharmonic Note Names.
What if we want to add a flat to C? Where there is no black key between C and B there are Enharmonic Note Names for the white keys that have no black keys between them. These give us the note names Cb, Fb, B# and E#.
With the addition of these note names we now have every note name in the musical alphabet, every note name in the musical alphabet with a sharp and every note name in the musical alphabet with a flat.
This provides us every note name needed to write every major scale there is. The best way to illustrate these white key Enharmonic spellings is to look at the C# Major scale and the Cb Major scale. In the C# Major scale every note has a sharp. In the Cb Major scale every note has a flat. Both of these scales will use the same musical alphabet starting on C. Both will have their notes placed on the Staff at the same location as the C Major scale and both use Enharmonic note names found on the white keys.