Overwhelming "sound" that breathes life into songs. Advanced ``control'' that enables artists to pursue their own unique and dynamic expressions. Light and compact "mobility" that supports active music activities. MODX+ is a music synthesizer that gives modern keyboardists who play in a variety of situations, including stage performance, live streaming, and music production, overwhelming expressive power and the mobility to carry it anywhere. Approximately four years have passed since the release of the first generation MODX (October 2018), and MODX has repeatedly updated its OS (v1.1 → v2.0 → v2.5) in response to the changing needs of the scene. MODX+ inherits all of those updates while enhancing sound source performance to further improve expressiveness. In addition, the user memory area has been expanded to accommodate the addition of large-capacity sound libraries that are being expanded day by day. This is the successor model of MODX, which has improved basic performance and expressive power to suit changing scenes.