Minimal viable product:

intro screen when app starts, contains description and link to video tutorial, that is viewed in notio video window .

Video screen is scaleable and the visibility and scaling is shared when the setup is shared.

The notation does not jump when selected starting from chord-extensions

The user can select different color schemes.

and from previous milestone:
Scales must be shown correct, double sharps, correct distribution of C-D-E-F-G-A-B
Scales German notation must use B in stead of Hb

One custom scale can be created and shared.

The scales are mapped on the keyboard first note on the A-key , then on every key up to the *-key
Double sharps must be implemented in staff-module(score) and in sound module.

The octave can be shifted, resulting in tones being shown and sounding in the selected octave.

The note staff can be toggled on and off.