[youtube]http://www.youtube.com/watch?v=m_rdMNTXLu0[/youtube] YM2151, aka OPM is a single-chip FM synthesis implementation, an eight-channel four-operator sound chip. it was used in many 80’s arcade games and home computers.iYM2151 is the The world’s first FM synthesis music workstation app using YM2151 simulator engine… Read more