equalization is desired to obtain a contoured equalization the control curve varies by frequency and may be defined specifically for every sampled frequency value of the equalization may be a continuous function of frequency or may be a function of control points at a select number of frequency points the control curve may also have automatic inputs e g a machine detected cutoff frequency of a speaker may be used to determine a control point in the control curve as another example the reverberation time may be used to determine a control point in the control curve the result is a contoured equalization curve without sudden steps application_number US 201514805118 A description the following description is of the best mode presently contemplated for carrying out the invention this description is not to be taken in a limiting sense but is made merely for the purpose of describing one or more preferred embodiments of the invention the scope of the invention should be determined with reference to the claims an example system level description of a prior art two channel 12 a and 12 b audio system 10 with equalization filters 18 a and 18 b in the channels 12 a and 12 b for modifying and or correcting loudspeaker room acoustics is shown in fig1 the equalization filters 18 a and 18 b are in series with signal processing 16 a and 16 b respectively the system 10 receives a signal 12 including the two channels 12 a and 12 b processed in parallel.