This is the standard that most of producers work on. In these type of projects the base is original from the producer — chords, melodies, leads, etc — but it contains additional melodic elements that complement the track and come from royalty-free sample packs. They are usually vocal chops, real instrument chords or textures, wobbles basses, glitch effects, etc. In a project file of this category you will find MIDI files created by the producer, but also melodic loops
All melodies are made with Serum VST. Also, I've used vocal chops from sample pack.
Instrument Vocal Chops
Sample pack Sounds of KSHMR Vol.3
Loop name KSHMR_Vocal_Melody_07_100_D#