Irish bouzouki Dónal Lunny, who replaced the octave strings on the two lower G and D courses with unison strings, thus reinforcing their lower frequencies. Soon after, on a visit with Irvine to the workshop of luthier Peter Abnett, Lunny commissioned a bouzouki to the specifications of a classic, 4-course Greek bouzouki but with unison strings and a three-piece, partially staved back. Since then, the instrument has been adapted for Irish traditional and other styles of folk music. The original Greek bouzouki was a three course/six-string instrument ("trichordo"). In the 1950s, a four course/eight-string ("tetrachordo") version was developed. The newer "tetrachordo" bouzouki
Bouzouki instrument more laborious. To achieve this, manufacturers use different techniques, each one having their own secrets. Many modern instrument have a metal rod or bar (truss-rod) set into a channel in the neck, under the fingerboard, which adds some weight, but increases rigidity, and allows adjustment of the neck should it begin to warp. The Greek bouzouki is a plucked musical instrument of the lute family, called the thabouras or tambouras family. The tambouras has existed in ancient Greece as pandoura, and can be found in various sizes, shapes, depths of body, lengths of neck and number of strings. The