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.
Guitar Deep House track in the style of Robin Schulz, guitar recorded by me.
Sample pack GOLDHOUSE Sound Pack
Loop name GOLDHOUSE_128_synth_loop_sprinkles_Fmin