The Solid State Logic Fusion HF Compressor plug-in emulates the high frequency smoothing circuit from the SSL Fusion stereo outboard hardware processor. This compressor only affects frequencies above the crossover and delivers the distinctive sound of high-frequency rounding. With the ratio, attack and release all optimized for maximum transparency, the smooth compression and tape-like high frequency roll-off help tame unwanted harshness that can build up in a mix or with individual stems. In addition to the features of the original hardware, the SSL Fusion HF Compressor plug-in introduces Mix and Auto Gain controls, which allow you to dial in the perfect amount of HF smoothing and apply an automatic makeup gain to the compressed frequencies. Combined with feedback from the Gain Reduction graphs, meter and circuit activity LED from the original hardware, quickly taming harshness is a breeze.