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
Irish bouzouki De Dannan, obtained a "trichordo" Greek bouzouki on his own. With a few exceptions, bouzouki players playing Irish music tend to use the instrument less for virtuoso melodic work and more for the chordal or contrapuntal accompaniment of melodies played on other instruments, such as the flute or fiddle. Because of this, it is common to use matched strings on the two bass courses, tuning to unison pairs in order to enhance the bass response of the instrument. Almost immediately after the Greek bouzouki's initial introduction, new designs built specifically for Irish traditional music were developed. The body was widened