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 crunchyName Description; add.mdb.chips: This event is trgered when you add a new chip to the chips input. Using e.preventDefault() enables adding custom validation.: added.mdb.chips: This