Ingonator wrote: A 3 Pole filter could be helpful for my "Acid" Bass patches
Have checked with help of a Signal Analyzer. The minimum knob positions seems to correspond to 24dB, the maximum to 6dB and the middle position to the 12 dB filter. based on that the 18 dB should be between the minimum and the middle.
its a myth the 303 used an 18dB filter, it uses a 24dB filter. So you dont need a 3 pole filter in OBDX to create 'acid' patches.