SYNTHET standalone universal synthesizer patch editor Sequential / DSI Prophet REV2 editors VST/AU Pioneer Dj Toraiz AS-1 editor VST/AU Sequential / DSI OB-6 editor VST/AU Sequential Prophet-6 editor VST/AU Sequential / DSI Prophet 12 editor VST/AU Sequential / DSI Pro 2 editor VST/AU Sequential / DSI Prophet'08 editor VST/AU Sequential / DSI Mopho X4 editor VST/AU DSI Mopho Keyboard editor VST/AU DSI Mopho Desktop editor VST/AU DSI Tetra Program editor VST/AU