Nat McIntosh plays multiphonics on tuba.

I thought this was cool, had seen multiphonics by Brecker on sax, but not on a tuba before.

“I’ve received hundreds of questions about my solo feature, “The Warrior Comes Out to Play”. I wrote this piece about seven years ago, designing it to be a showcase for all of the extended techniques I had perfected up to that point, including multi-phonics, (singing and playing simultaneously), emulation of electric bass and guitar sounds (done trough manipulation of the embouchure), DJ scratch effects, (high percussive rhythmic patterns made with extreme register playing, and what I call “Cosmic Bass”, (sound alterations most akin to a flange or didgeridoo).

There are so many unexplored possibilities of the sousaphone and being a longtime fan of groove-based, high energy music, it is very rewarding to utilize my instrument’s versatility to play something that is both technically impressive and funky at the same time. Hope you enjoy it!”

(http://www.dallasbrass.com/nat.html)