It’s possible to get chords (multiphonics) pretty easily on some tin whistles. I have an old Generation C from the 1970s with a chipped mouthpiece that can get some very clear multiphonics on certain notes. I can also get them on a salgflojt (traditional Swedish flute with no toneholes that plays natural harmonic scales), by playing softly.
I watched the Robert Dick videos…amazing stuff, though it seems like more of a party trick than music.
The “glissando” headjoint is cool, isn’t it? 
YOWZA! I just listened to “Piece in Gamelan Style”. It blew me away. It was cool to see how he mikes the flute too.
There are some nicer gentler Classical tunes in there too, the stuff on bass flute is very pretty. The Telleman things, and Syrinx, especially. In Syrinx there is a place where he does the 2 octave trick.
You see that sometimes. The meaning varies. It could be harmony notes (for example, if you have 3 players playing in unison, but at a certain point they switch to harmony), or could be optional notes (you pick which one you prefer), or it could be meant for you to play the 3 notes in sequence, as if you were arpeggiating them. With 2 notes, it might also be a tremolo (kind of like a trill), but not with 3.
I will preface my remark by saying that I know very little about what I’m about to say. That kind of lets me off the hook, in case what I say is stupid. As has been said before, one way to get a chord from a wind melody instrument is to hum or sing one note and play the other note on the flute or whatever.
With regard to throat singing (singing multiple notes at the same time), I have heard the Tuva throat singers in concert. I was impressed! I especially liked their bowed instruments with the horse heads. I’ve been looking, but you don’t see those come up on ebay very often. My 1/4 size Chinese cello seems lacking in character by comparison.
Throat singing, in my opinion, is quite easy to do at a beginning level. I like to practice when I am driving down the highway, especially when I finally get tired of looking at all the fields of corn. I like variety, and mono-crop agriculture is boring, even if profitable. The interior of a car is a good place to practice throat singing. You have to be careful though with all the overtones floating around the interior. This hasn’t happened very often, but I have noticed that the dash board lights started to blink and malfunction when I hit certain notes.
Best wishes and happy fluting. 
Doug, was the band named Hun Huur Tu (something like that spelling, anyway)? They’re great.
If you want a Morin Khur (Mongolian horseheaded fiddle), “Shark” in the Morning sells 'em for around $700USD last I checked. The quality of their upper-end items tends to be good, although better bargains could be had elswhere, I’m sure.
Bartolozzi, Bruno. New Sounds for Woodwind. Translated and edited by Reginald Smith Brindle. New York: Oxford University Press.
Dick, Robert. The Other Flute: A Performance Manual of Techniques. 2d ed. New York: Multiple Breath, 1989.
Howell, Thomas. The Avant-Garde Flute: A Handbook for Composers and Flutists (Berkeley and Los Angeles: University of California Press, 1974). i own or owned a copy of the howell book.there are 3000 or so fingering combinations which work on most french keywork boehm system flutes to produce chords/multiphonics. some of the fingerings don’t require the french style. one fingering i can remember is d3 but blow it as d1 and if you open the g# key it climbs a 1/2 step. try it, that is if consonance is not the rule of the day. ahhh, my misspent youth!
That Morin Khur at “Larkinthemorning” is SO COOL. Do you play it tucked under your chin? Love the figurehead.
Once I saw a video of a session in Frank Zappa’s house where he had the Chieftains performing with the Mongolian Throat Singers and Johnny Guitar Watson, all at once. How “World” can you get. Zappa was very ill at the time and it certainly cheered him up.
Julia C
and l. shankar on violin.
Hi everyone,
I use multiphonics sometimes. As well as messing around with my own fingurings, I found the virtual flute site very helpful in finding out the fingerings. It models the physics of 3 boehm flute designs to work out what a given fingering will produce. It also does microtones!
The link is
http://www.phys.unsw.edu.au/music/flute/virtual/main.html
(I must buy Robert Dicks book, it is almost never in the university library, which indicates how useful it is if you are into this “extreme” stuff!!)
Too big for that. Although not as large as a cello, it has a similar spike-type foot, and the player stuck that in the front of his knee-high boot to secure it as he played it upright. All the more cool and romantic, eh?
What I loved about the Tuvan music was that it was unmistakeably that of a horse-focused culture. The rhythms reflected those of equine gaits, and the sense of unbounded freedom in the music was wonderful. By the way, the name of the group I heard, Hun Huur Tu, refers to sunlight as it plays in shafts upon the plains, and is an analogy for throat singing. Mind you, this is as I have my facts down and memory serves.
Amended to exclude their overall selection of pipes.