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.
Reggaeton track with catchy trumpet and ambient vocal chops.
Instrument VOCAL CHOP
Sample pack Missed Calls Midnight Soul (Splice.com)
Loop name 91V_MC_130_vocal_adlib_sax_doos_Am