A printer for reporting a printer error state to a user using sound, a control method for the printer, and a data storage medium storing the control method as a computer-readable program use a printing unit that prints text or graphics, a detector that detects specific printer error states, and settings memory that stores a setting determining whether errors are reported using sound. The electrode is a hollow body, that an end region of the electrode protruding into the container is embodied as an oscillatable membrane. The user interface may be displayed as one or more media channels, where a portion of each media channel may comprise information identifying the automatically selected media. The method further includes detecting interaction products of the beam with the object, and deciding whether the processing of the object is to be continued or can be terminated with the aid of information which is obtained from the detected interaction products of the beam with the object.