The original Apathy controlled all 512 DMX levels with its single control knob. However this was too simplistic for some users so Doug Fleenor Design added the industry's most hostile user interface to create the Apathy Minus. Now, through a complex timed sequence of button presses, any single DMX channel can be assigned to the knob. Once selected, channels may be easily incremented or decremented.
In its most basic mode, the Apathy allows you to command all 512 DMX dimmers to the same level using the single intuitive control knob. Using the Apathy function button, you can assign control of a single DMX dimmer to the control knob. Apathy Data Sheet