In the manual it states: When using the Analog Four as a stereo filter, let track 1-2 take care of the left signal and track 3-4 take care of the right. Don’t forget to pan the synth tracks responsible for the left and right channels hard left and right. If you wish to control the FRQ or RES parameters of the left and right tracks simultaneously, use a performance macro.
Why do I need to use 2 tracks for each input?