1. An apparatus for providing one or more adjusted parameters for a provision of an upmix signal representation on the basis of a downmix signal representation and an object-related parametric information, the apparatus comprising: a parameter adjuster configured to receive one or more input parameters and to provide, on the basis thereof, one or more adjusted parameters, wherein the parameter adjuster is configured to provide the one or more adjusted parameters in dependence on the one or more input parameters and the object-related parametric information, such that a distortion of the upmix signal representation caused by the use of non-optimal parameters is reduced at least for input parameters that deviate from optimal parameters by more than a predetermined deviation.