I am writing a demonstration for a digital GUI for analog filter design. Since demonstrations only allows for one Manipulate function, is there any way to dynamically update my Manipulate controls?
E.x. I have 4 different filter types (Lowpass, Highpass, Bandpass, Bandstop), the former two only require two frequency inputs while the latter two require four frequency inputs. Is there a way to switch between two Manipulate sliders and four based on which mode was selected without nesting Manipulates? Alternatively can I have all four and grey out two when they are not needed?