Darkglass Electronics SSCOM Super Symmetry Compressor Bass Compression Effect Pedal Blend: Like all of our pedals, allows for mixing the compressed and clean signals, ideal for fast compression adjustment Input: Adjusts the gain on the compressor. Besides working great for ensuring clean operation, it also allows for adjusting the threshold over which the compressor starts reducing gain Attack: Sets the time until gain reduction begins (higher settings will translate into faster Attack times). Release: Sets the time after which the signal goes back to pre gain-reduction levels. Higher release settings will hold the compressed signal for shorter time.