They offered a size-reducing design alternative to bulky waveguide filters and lower-cost alternatives for electronic oscillator, frequency selective limiter and slow-wave circuits.
Its master section featured an adjustable threshold limiter to prevent overload distortion, and there was a separate microphone/line switch with low-cut filter on each channel.
Some of the functions of these plugins include distortion, resonators, equalizers, synthesizers, compressors, chorus, virtual amp, limiter, phaser, and flangers.