There is a track #4 called THE MESSAGE (instrumental) right before LORD OF THE RINGS with nuthin but SYNTH. I want to know how to make that Ballsy synth sound with the KARMA if it can be done

I know back in the day alot of that stuff was layerd overdubs.
note: I don't care for the arps going on in the track just that kick ass synth using the 5ths

Any help would be appreciated :
Thanx in advance ^-^
Oooopps got lucky

Take a listen: http://www.youtube.com/watch?v=RHKxDiKmrqI