A model of the industry standard stereo 4 Band Dynamic Equaliser. Accurate modelling of the analogue circuit implementation resulted in clean dynamic equalisation with log domain ballistics, asymmetrical width, proportional Q response and an accurate emulation of the filter gain summing process. The user interface is similar to the industry standard control layout with the addition of a dynamic frequency response curve. Based on user feedback, we allow for both cascade/parallel sidechain filter configurations. Cascaded sidechain is the default with filters accommodating any changes from the previous band. Parallel avoids band interaction and allows easier setup of each band. In both cases Left and Right channels are summed to produce a common sidechain signal.