Synthesizer V Studio Pro version 1.9.0, released in June 2023, was a major milestone that introduced Rap Vocal Synthesis

For the first time in commercial synthesis history, 1.9.0 introduced Rap Vocal Synthesis

: The UI has been refined to better distinguish between different pitch modes using a bicolor approach (adding small markers to notes) rather than just colors, which improves contrast and visibility.

The legacy "Instant Mode" was redesigned. Users can now toggle between Manual , Sing , and Rap modes on a per-note basis for granular control.