That bass is build with two specials * FM modulation * Legato-slide Further more is it in very low frequency. That is not all that easy to get right.. In LMMS we have FM modulation with legato in zynAddSubFX (zasfx). zasfx is a beast! , but with a flat learning curve! Synth1 is a real good candidat...
okay:
@0:53 -> 1:05 -- the bass drop is here (and the bass that I need)