So, download MIDI-OX, hunt down that rare 1994 sound library, and feed your X3 the data it craves. The 90s are calling, and they sound incredible.
You loaded an 01/W or T-Series file. The Korg 01/W, T1, T2, T3, and X3 share the same AI² synthesis engine, but the multisample maps (which wave goes to which key) are different. Loading an 01/W bank into an X3 will map sounds to waveforms that don't exist. Only load .syx files explicitly labeled for Korg X3, X2, or X3D. korg x3 sysex files
SysEx is the "exclusive" language that allows a computer or another MIDI device to speak directly to the Korg X3's internal brain. A (SysEx) file is simply a digital recording of this conversation. It contains the raw data of your synthesizer’s memory, saved onto a computer. So, download MIDI-OX, hunt down that rare 1994