Irish bouzouki Johnny Moynihan (apparently in an attempt to replicate the open, droning sound of Appalachian "clawhammer" banjo) first on the mandolin and then transferred to a Greek bouzouki. It was later picked up by Andy Irvine and Dónal Lunny, and quickly became the next thing to a standard tuning for the 4 course instrument. Other tunings used, although by a minority of players, are "octave mandolin" tuning G2 D3 A3 E4, and "Open D" tuning A2 D3 A3 D4. "Open G" G2 D3 G3 D4, is used by some players and has proven useful for "bottleneck" slide playing. The GDAD tuning
Bouzouki one piece. The top plays a major role in the sound because it resonates and strengthens and prolongs the vibration of the strings. Another factor that affects the quality of the sound is the varnish and the method of its application. The best varnish is a natural one made of shellac, which is applied by hand in many layers in the traditional way, for both acoustic and visual effect. The neck must be of very dry hardwood in order not to warp and increase the distance of the strings from the fret board (the action height) which makes playing the