The bundle represents a landmark era in digital audio processing, particularly for users of Mac OSX Intel systems. While the industry has since moved toward Version 5 and Apple Silicon support, the 4.1.1 release remains a legendary toolkit for producers using legacy AU, VST, and RTAS environments.

List of major plugins and concise functional descriptions (sample):

The 4.1.1 bundle expanded on the original five core effects to include eight or more high-end processors: : A versatile delay and echo emulator.