A data storage medium such as an optical disc with separate image and data tracks, and a method and apparatus for forming the same. Because the conductive polymer is soluble in various polar organic solvents, the solvent may be freely selected depending on the end use of the conductive polymer and thus the conductive polymer has a very wide range of industrial applications. A control andor a regulation influences a torque variable that characterizes the torque of the internal combustion engine andor the noise variable that characterizes the noise of the internal combustion engine, using a control variable.