KR-Fatter STR from KResearch is a modular hybrid plug-in processor using two different proprietary time and frequency domain DSP platforms in a single unit. Spectral Transformation Resynthesis (STR) operates exclusively in the frequency domain and makes use of spectral transforms for synthesis and audio effect design. The time domain processing elements includes fractal based variance controls. The software can be used to enhance the spectral content of signals containing vocal, instrument, or synthesized sound recordings.
Using different combinations of the modules allows for creating effects like fattening, spectral coloring, imaging, harmonizing, pitch shifting, delay, modulation and other special effects. The modules and functions can be used in both serial and parallel configurations and up to four additional stereo copies or ten mono channels of the input signal can be created, and then processed individually and mixed together in a final master stereo output bus.