Writing original string quartets using counterpoint techniques, and then overlaying them on top of commercial dance vocals is something that I do.
I mostly got these voice stems from DJ competitions.
I usually think of the core ideas that I want to write about, and then write the counterpoints after the core ideas.
Although technically a remix, nothing in my symphonic parts came from the original track.
Usually I just wrote these freehand on a MIDI keyboard as tracks into Ableton Live, and then mixing the vocals back as separate layers, blending everything back together after tweaking various audio parameters.
I took a class in music composition at Yale, but I don’t have other formal training in audio engineering.
Just like everything else that I do, I learn it from doing.
I know that it’s very random, but crazyisgood!