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.
In this project is used Serum, Sylenth 1, Nexus 2, Kick 2, Kontakt 5. There is only one guitar sample in the project. For vocal chop i used Kontakt 5.
Sample pack Revealed Guitar Essentials Vol. 2
Loop name REV-GE2 Combi Guitar Loop 26 A#min (128 BPM)