Layer 2 patches. Give one a sync sweep that goes up, give one a sync sweep that goes down. (sync pitch around 10 sync pitch depth +30 for scene 1 -30 for scene 2 sync pitch src envelope filter) give it an organ kind of an amplitude envelope. Give it a lot of stereo separation. Lost the better part of an evening playing with that.
Scene 1 is a simple bass, one osc. Scene 2 is a simple bass, same pitch, 2 osc, record into sequencer. Play back the sequnce and record using Scene morph to vary the sound. You get this incredible hard to duplicate sound.
Jimmy