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.
Royalty-free melody and chords + royalty-free vocal chops.
Instrument Vocal Chops
Sample pack Cymatics - Vibes
Loop name Cymatics - I See You Vocal - 110 BPM G Min