Arbor , is one of the oldest stringed instruments . Stretched and released when blowing a bow and arrows bow string will sound a reson . Single-stranded wires in various lengths pedestrians, add different sounds by playing with their tension was removed . Then conducive to upgrade the sound of a body ( sound box) added a real instrument was mede .
They developed the first instrument from one of the " lyre" du . They are very widely used by the Greeks and Romans Apollo's lyre God did by inserting wires into an empty tortoise shell believed .