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.
Disco festival track with brass and strings sections, featured with disco bassline, filtered synths and slap bass.
Sample pack Push Button Bang - EDM Drop Vocals: Hooks, Screams & Shouts
Loop name EDV_GROUP_VOX_010