There are three basic categories of wind instruments (edge-toned, reeds, lip-buzzed) based on how their sounds are produced.
Edge-toned refers to flutes, pan-pipes, and ocarinas, all of which produce their sounds in basically the same way as blowing over the edge of a bottle does. Pan-pipes work as sets of single tubes, Ocarinas work as bottles whose volumes of air can be altered by opening and/or closing holes, Flutes work as tubes that can be lengthened or shortened by opening and/or closing holes. The difference between flutes and ocarinas is that on flutes the holes need to be played in order as air will sound only at the shortest length while on ocarinas the effect of opening the holes is cumulative, essentially shrinking the size of the resonant cavity.
I make a lot (scores) of these (flutes in particular) to obtain different timbres, ranges, and modes/tunings. Early on I decided that making multiple instruments with individual qualities was preferable to making fewer, more complex, instruments that required more specialized techniques. My desire is that the “breathing instruments” are as intuitive as possible to play so that the player’s state of mind is closer to singing (wordlessly) than executing a mechanical task.
Some of the edge-toned instruments of anarchestra:
Ocarinas Santa Fe 05
These are made from old school (steel, i.e., pre-plastic) fishnet buoys that my brothers and I found washed ashore on the beach as a boy.
Ocarina Tree Chilmark-Santa Fe 02-06
On the left are four slidewhistles (Furtwangler) , on the right are four ocarinas made from propane tanks, hanging below is a fishnet buoy ocarina. The copper dome functions as a sound collector enabling all the instruments to use a single microphone.
Steel Flutes Chilmark 01-02
Two of these are side blown and two are end blown.
Round Flutes Santa Fe-Tucson 04-09
Square Flutes Tucson 12-15
Fourflusher Tucson 12
This device allows a player to change keys without needing to put down and pick up separate instruments.
Doubleplay Tucson 10
A device which allows one to play two flutes simultaneously.
Copper Panpipes Tucson 10
Steel Panpipes (high) Tucson 10
Steel Panpipes (low) Tucson 10
Slidewhistles Chilmark 03
Slidewhistles are tubes that behave the same way ocarinas do.
Furtwangler Chilmark 02
Four slidewhistles playable simultaneously.
Flutes, Panpipes and Slidewhistles Chilmark-Santa Fe 02-06
Ch’org Tucson 16
A fire organ played with propane torches.