Abstract: An interface for maintaining man-machine communication with a control system for tuning appliances that influence the ambience, wherein a user command given during operation is converted to settings of these appliances in accordance with at least one predetermined conversion model, wherein the conversion model is a three-dimensional one, with parameter axes that refer to predetermined aspects of ambience, and in that the conversion model possesses adjustable discrete values pertaining to these aspects of ambience, and that the model provides an unambiguous interrelation that is continuous between said discrete values, linking a user command to the ensuing settings of the appliance depending on said values of the ambience aspects and the given user command.