The signals from the four filters are wired in a parallel chain. Every filter can be controlled by three different LFO's where one is tempo synced; one normal and one extremely slow (a sLoFO). The LFO sections also have something we call VariFO. It adds another movement to the LFO and makes it less predictable. Every filter has an invert button so that you can silence frequencies that collide during heavy LFO movements, this and the VariFO is probably what make Noisebud filter in somewhat special.