Fixed-do System Keyboard

What is Fixed-do System?

Fixed "Do" is an absolute system where "Do" is what we refer to as C.

 It is a consequence of learning the notes using that nomenclature. It is the primary system taught by European conservatories.

C and C-sharp are both named "Do." The voice must inflect up or down the actual pitch while saying "Do." D, D-flat, and D-sharp are all named "Re." Etc.

In this system, the ascending pitches of a C-major scale are named Do, Re, Mi, Fa, Sol, La Ti, Do. An ascending E-major or E-minor scale (or an E-scale in any other 7-tone mode) is always labeled Mi, Fa, Sol, La, Ti, Do, Re, Mi. Etc.

Take F key for example to explain the fixed-do system keyboard:

Click Keyboard->Fix-do System->choose F Key

After this, the keyboard turn to: