Geoff Daking talks about his new 500 Series Compressor at AES 2012. The compression is set with one knob-- less compression or more compression. Attack is switchable between fast and slow, and Release is switchable between fast and Auto. Ratio is about 4:1 (comp) or 20+:1 (limit).
Learn more here: http://vintageking.com/daking-comp-500