The instrument has a body made from the stem of a bulrush, and a reed cut into the tube at the top[1] (a split that forms a flexible edge that vibrates when blown).
The split reed was retained as a tip, the same style of mouthpiece as on the ghoshmeh.
Some sounds have to be made by overblowing or by partly exposing the finger holes.
The dilli-tuiduk makes a penetrating sound and is used to play tunes of Turkmen folk songs.
Versions of song tunes in the form of ditties for the dilli-tuiduk start in a long drawn-out sound going into the main melody.