EDIROL SD-20 Driver Ver.1.1.0 for Windows 98 / Windows Me For Product(s): SD-20 This is the EDIROL SD-20 driver for Microsoft(R) Windows(R) 98 / Microsoft(R) Windows(R) Me. Multiclient support As many as four applications can simultaneously use each MIDI OUT/MIDI IN port. Simultaneously use four units Up to four SD-20 units can be connected to a single PC via USB. For Operating System(s): WindowsMe / Windows98