Yamaha Expansion Voice Editor is a specialized tool used primarily for legacy Yamaha arranger workstations, such as the PSR-A2000, PSR-S950, and PSR-S750 , to create and manage custom expansion packs in the file format.
The trial version is essentially a viewer. You can open it, look at the parameters, and maybe listen to a demo. However, it has one crippling restriction: You can spend three hours designing the perfect cinematic pad, but when you click "Save," the software locks up or simply refuses to write the file. Yamaha Expansion Voice Editor Full Version