25+ years of IT experience. I build native Windows desktop applications that bridge the gap between technology and music — with a focus on Yamaha arranger keyboard tools.

I'm Vali Maties, a software developer from Romania with over 25 years of experience in the IT sector. My career spans enterprise software development, systems architecture, and user-focused application design.
"My combined expertise in software engineering and music production led to the development of tools specifically designed for Yamaha arranger users — software that solves real problems for musicians."
Beyond the corporate world, I am a passionate musician and arranger keyboard enthusiast. I currently play a Yamaha Genos2 and a Korg Pa5X, having previously worked with the Tyros2, Tyros5, Genos, Pa2X Pro, and Pa3X over the years.
I have been an active member of the PSR Tutorial community for many years, contributing tools and insights to fellow Yamaha keyboard enthusiasts. My YouTube channel features demonstrations, tutorials, and music-related content aimed at the arranger keyboard community.
I build native Windows desktop applications that deliver fast startup, a small footprint, and a polished user experience — without requiring any additional runtime to be installed on the end user's machine.
Utilities and tools available at no cost for the keyboard and music community.
The original free edition of YEM Content Explorer. Browse and manage your Yamaha Expansion Pack library, export voice parameters, and run the Multi-YEM Manager — at no cost.
Organize and manage registration playlists for Yamaha keyboards. Import alphabetically, sort, and batch-edit entries for Genos and PSR-SX series.
Copy One Touch Settings from one style file to many others in one operation. Supports Genos2, GM, XG, and GM2 voice tables with color-coded slot indicators.
Professional-grade desktop applications with full license support, online validation, and regular updates.
Browse, preview, and manage your Yamaha Expansion Pack library directly from your PC. Developed in response to the PSR Tutorial community's needs.