1. A system, comprising: a first filter portion configured to receive one or more input signals and to provide a single intermediate output signal; a second filter portion configured to receive the single intermediate output signal and to provide a single output signal; and a control circuit configured to receive at least a portion of each of the one or more input signals and at least a portion of the single intermediate output signal and to provide information to adapt filter characteristics of the first and second filter portions, wherein the control circuit is configured to automatically select one of a plurality of stored vectors having vector elements, wherein the selected one vector is used by the control processor to generate the information to adapt the filter characteristics.