Hey, dont know if i should really post this here but, Im curious about the basslines that these producers use, both of the melodies are different but one compliments the other and you can really appreciate both of them(bassline and main synth).
If anyone could tell me how do they mix their bassline with their main melody i would be very grateful.

Examples: Justin Mylo-Jumping Jack
Mike Williams & Dastic-Candy
Ill Phil - Seven Nation Army (Mesto Remix)