(Fr.: cithare sur tuyau; Ger.: Röhrenzither), primitive zither with string bearer having a vaulted surface. It may consist of a whole tube, such as a length of bamboo, in which case the tube acts as resonator; or the tube may be halved lengthwise, constituting a so-called *half-tube zither, with strings stretched over the convex surface of a gutter. Tube zithers are further divided into idiochord and heterochord instrs. In the former, a narrow strip of the bark is cut...