The instrument being played as part of a keroncong group. The Cuk is on the left and the Cak is on the right.
String instrument
Classification String instrument
Hornbostel–Sachs classification
(Composite chordophone)
Related instruments
Cak (instrument), Ukulele, Cavaquinho,

The cuk is a stringed musical instrument from Indonesia.[1] It has 3 strings in 3 courses. It is tuned G4 B3 E4. The strings are made of thick nylon.

The instrument evolved from the Portuguese cavaquinho. The body is usually hollowed out of a solid piece of wood. It is mainly used to play Keroncong music along with the cak.


  1. ^ Rachman, Abdul; Utomo, Udi (May 2019). "The Rhythm Pattern Adaptation of Langgam Jawa in Kroncong". Atlantis Press: 99–101. ISBN 978-94-6252-722-5. ((cite journal)): Cite journal requires |journal= (help)