there's specific circuitry involved with the moog filter.



chrome-extension://oemmndcbldboiebfnladdacbdfmadadm/https://www.moogmusic.com/sites/default/files/Ladder_Manual.pdf


page five talks about the filter poles, and further down they give some settings on the moog filter itself.



you can also do some research on moog filter emulations, moog filter type and what not.




to get the sound, some times you need the sound generator. but for emulation sakes, check out that pdf.