Vortex Sound Research

Hey guys I run fl studio with synth vsts ....im a fan of ozric tentacles and nodens ictus ....im asking about arpeggios/ filters etc ...how do they build those sounds they use on synths ...would I be better with a hard synth like they use live ? .but I know a lot of their live stuff is pre parareed on laptops ....I want to replicate the arpeggios they use...cheers