SP-404SX Updates & Drivers SP-404SX System Update Version 1.07 This system program updates the SP-404SX system program to the latest version 1.07. SP-404SX Wave Converter Ver.1.00 for Windows SP-404SX Wave Converter is a software that can write WAV or AIFF files from your computer to an SD card and assign to the pads of the SP-404SX. SP-404SX Wave Converter Ver.1.01 for macOS 10.14 / macOS 10.15 SP-404SX Wave Converter Ver.1.00 for Macintosh SP-404SX Utility CD-ROM