SAN FRANCISCO--(BUSINESS WIRE)--The ONE Music Group, manufacturer of quality musical instruments incorporating digital technology that makes learning to play faster, easier and more enjoyable for all ages, announces today the North American launch of its piano product line: The ONE Light keyboard and The ONE Smart Piano, which is the world’s first and only upright, Apple MFi-certified piano currently on the market. The ONE Music Group also announces a corresponding Indiegogo crowdfunding campai