The UBK-1 is a three-stage dynamics processor with simultaneous serial and parallel audio paths that open up unprecedented levels of control over a sound's shape, tone, and harmonic character.

The processor has three engines - Saturation, Compression, and Density. Five meticulously tweaked compressor curves are provided, all based on the popular UBK FATSO hardware. A high pass (HP) sidechain filter with an unusually wide frequency sweep allows for unorthodox shapes of compression. Two "Tele" style rockers control the wet/dry Mixes, and feature several optimized preset positions as well as fully variable operation. A Headroom control simultaneously adjusts the sidechain level of all three engines without affecting the plugin's output level. At the end of the chain, the Density engine adds an additional frequency-selective compressor/harmonic saturator, with a switch for targeting the mids or highs. The cumulative effect of these three engines is a thickness and musicality typically associated with expensive analog processing.