The ektara was a regular string instrument of wandering bards and minstrels from India. It is plucked with one finger. The ektara usually has a stretched single string. An animal skin is over a head made of dried pumpkin/gourd, wood or coconut. The neck is a pole or split bamboo cane.
Pressing the two halves of the neck together loosens the string. This lowers its pitch. The sound can be changed many ways by slight changes in pressure. There are no markings or measurements to show what pressure will make what note, so the pressure is adjusted by ear.
The various sizes of ektara are soprano, tenor, and bass. The bass ektara, sometimes called a dotara often has two strings.