I have made an Arduino shield powered by the YM2151. This is a 8 voice FM synth witch is also in the DX21 and DX100. I have ordered 10 PCB’s so if anyone is interested, i sell them for 25 euro’s ex. shipping. It comes with a sketch to control it completely through Midi. I have also made a panel in CTRLR to control all of the shield.
Demontsration at: www.youtube.com/embed/uvQk5IbCYwE