The psaltery likely originated somewhere in the Mediterranean around the time of the Greek empire, and the bowed version pictured above emerged in the 19th century. The strings are played between the pegs with a bow. The chromatic type has 20 strings with a scale from C´ to G´´. On the right side there are the notes of C major, on the left side the complementary half-notes. The pentatonic Psaltery has double strings for each tone, except for the lowest. One advantage is that it can be played with two bows. The other, that the sound quality of the instrument is improved to a great extent. This Psaltery is perfect for improvisation as each tone fits with the other and there is no disharmony.