chip mdChip synth MD. MD features a bit accurate OPN2 (YM2612) emulator. We combined it with a SN76489-compatible square wave core (SPSG) and a special emulation of the very crunchyChip synth MD. MD features a bit accurate OPN2 (YM2612) emulator. We combined it with a SN76489-compatible square wave core (SPSG) and a special emulation of the very crunchy