The base is original from the producer (chords and melodies), but is complemented with elements that complement the song that come from samplepacks, usually, vocal chops, guitars, wobbles sections, glitch effects. It is the standard in which most of producers work, in a project you will find MIDI files made by the producer, but also melodic loops.
6 Layers Bass + 2 Brass Layers. Leads and Synths made in Serum. Sub also made in Serum. Only Serum + Native Ableton Plugins. Sidechain : Kickstart
Sample pack Mike Hawkins Essential Vol. 1
Loop name MH_Tension_String__F#___128bpm