Ekatantri veena

The eka-tantrī vīṇā was a medieval tube-zither veena in India, with a single string and one or more gourd resonators. The instrument became prominent in Indian music in about the 10th century C.E. as instruments of court music. Alongside the alapini vina and kinnari vina it replaced the harp-style veenas and lute-style veenas in sculpture. It was possibly a forerunner of the rudra vina. It shares its name with the modern single-string drone lute, the ektara.

The instrument is very closely related to the one-stringed alapini vina, an instrument which started out a stick zither but became a tube zither like the eka-tantri vina.