The dilli kaval (Azerbaijani: Tütək) is a traditional fipple flute from Turkey and Azerbaijan.

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.

Custom-made ebony-reed kavals in C# and F#, also designed by Burhan Tarlabaşı, are very rare.

Their sound is very crisp and similar to tin whistles, but the wood adds a breathy softness.