This website wants to help learning the Bandoneon keyboard.
The layout is based on the 142 button version (“Rheinische Tonlage”).
To internalize the button location on the both manuals the button map can be displayed.
Rselect the side and direction;
7select Major, Minor and Septime chord;
bselect the key; add
#to select sharp key;
Ctoggles button colors.
The keyboard layout is based on the Alfred Arnold 142 button Bandoneon (bisonoric, “Rheinische Tonlage”)
More information about the Bandoneon on Christian's Bandoneon Page.