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
Irish bouzouki A year or so later, Lunny accompanied Irvine to Peter Abnett's workshop and commissioned a flat-backed instrument with the same specifications as the modified Greek Bouzouki, thus the Irish bouzouki was born. This modified bouzouki became fully integrated into Irish folk music when Irvine and Lunny popularized it with the advent of Planxty in 1972. Irvine, however, credits Moynihan with having "brought the bouzouki to Ireland" in his lyric to "O'Donoghue's", his memoir of his experience of the early folk revival days in Dublin in the early 60s. In a parallel development, Alec Finn, later with the Galway-based traditional group