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.
This project has few layers, which makes it sound very energetic. I used royalty free guitar and vocals.
Sample pack Origin sound - Live Room
Loop name OS_LR_Stack_90_Gm_Classic_RnB_Guitar