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.
The instruments/synths are come from Sakura and some shot samples. The melodies are made by me
Sample pack Cymatics Vibrations
Loop name Cymatics - Vibrations Hip Hop Guitar Loop 14