By using the Yamaha Expansion Voice Editor Full Exclusive Version, you can:
The Yamaha Expansion Voice Editor is a powerful software tool designed for musicians and keyboardists who want to customize their instrument's sound library. This dedicated application allows users to create, edit, and manage custom voices and expansion packs for compatible Yamaha arranger keyboards and synthesizers.
The Yamaha Expansion Voice Editor (Full Exclusive Version): Architecture, Application, and Integration in Modern Sound Design
Once you design 50 voices, you click "Build Pack." The software compresses your WAVs into Yamaha’s proprietary format (which is sonically lossless but mathematically optimized for the keyboard’s ARM chip). A progress bar shows exactly how much of your keyboard’s memory you are using.