Ruban Neilson of Unknown Mortal Orchestra reveals 12-minute track "SB - 03"

The wild song is over 12 minutes long and dives headlong into a psychedelic guitar odyssey, morphs into experimental electro-funk, and then dissolves in a Arca-type blur of malice and weirdness.

Both UMO and SILICON released albums last year - the former dropping the sensational Multi-Love, and the latter subverting pop with Personal Computer.

Listen to what happens when both Nielson brothers get together below.