【實用音樂app】B System CBA|最夯免費app-綠色工廠好玩App

A continental chromatic button accordion simulator, popular in Eastern Europe, but found all over Europe. This is a B System simulator - there is also a (separate) C System simulator for players of that system; both apps are members of the My Melodeon family of button accordion simulators. Simulates both a 5 row, and a more compact 3 row instrument.