You can choose tonality, scale or chord type, octave to use, number of octaves, note colors with different colors pickers, and then play the scale or chord, with several piano sounds.
Display as a piano or a Mallet instrument :
Chords rotation or close voicing :
Or on a Mallet percussion instrument :
The main window showing chord computation :
The main window showing custom panel :
Sharps and Flats buttons change musical notation when harmonically possible
The practice window :
The Practice Window contains a metronome, a BPM finder, and a “favorites player” for practicing.
The circle window :
The circle window allows you to navigate through the circle of fifth while seeing the main window, computing chords, scales or your custom choice.