As of 2026, a legitimate license costs $49.99 on the Official Sonic Cat Website. Understanding the Authorization System
(now managed by Sonic Cat ) remains one of the most enduring "ROMpler" VST plugins in the music production world. Originally released around 2005, it gained fame for its incredibly low CPU usage and a massive library of sounds that mimic classic hardware workstations.
Purity was designed as a "next-generation" virtual sound workstation, effectively bringing the sounds of 90s and early 2000s hardware (like the Korg M1 or Yamaha XG modules) into a digital environment.