I've searched for this before as well... the consensus on message boards seems to be that Nico Jaar layered several tracks and/or did some kind of live manipulation.
//Lee
quoted 6 lines On Jan 6, 2016, at 4:01 PM, David Seruyange <g3scom@gmail.com> wrote:
> On Jan 6, 2016, at 4:01 PM, David Seruyange <g3scom@gmail.com> wrote:
>
> Old Nicolas Jaar set so hopefully someone can point me in the right direction:
> https://www.youtube.com/watch?v=IUjWumGIqe8&t=32m00s
>
>