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.
Serum for the most synths.
Instrument Vocal Chop
Sample pack Vocal Dance Reggaeton
Loop name DS_VDR_100_Vocal_Chop_Loop_Melody_SummerLove_F#m.wav