Nocturn is now a great Ableton Live device controller. The latest version of its Automap control software (3.5) means that when you open up one of Live's own instruments or FX, Nocturn's 8 knobs will automatically map to the first 8 parameters in the device. If you want to control more than 8 parameters on a big device such as Operator, you can simply 'page' through and control as many parameters as you want.