The dilli kaval (Azerbaijani: Tütək) is a traditional fipple flute from Turkey and Azerbaijan. It is typically made of plum, ebony, or apricot wood. It has seven holes on the front and a thumb hole on the back; the lowest hole on the front is seldom, if ever, covered while playing. Similar to a penny whistle, the register can be controlled by the force of breath. The word "dilli" is Turkish for "tongued" and alludes to the fact that this flute has a duct or "fipple" rather than being rim-blown like a conventional kaval.
The soprano dilli kaval in C and the alto version in A are handmade. Both types were patented by Burhan Tarlabaşı. All 12 chromatic tones from Low A to High G# can be played on them.