Here´s a Dubscope with the option to use the filter section alone (without the fuzz), the fuzz also can be use independently, there´s a suboctave section to bring the fuzz one or two octave down, there´s a balance knob to mix the straight fuzz tone and the suboctave. The knob on the back is for the fuzz vol. 4 step sequencer/longer non editable sequence and tremolo toggles.
So you can use this as:
-Fixed Low pass Filter
-Modulated Low Pass Filter
-All the above together or any combination of them