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
101 Strings is characterized by large-scale expansion of product, attempts to branch out to younger markets and beginning in 1969, eventual stagnation (although late efforts by Les Baxter and Nelson Riddle were released under the 101 name in 1970). Output decreased from 1974 on. A tribute to John Lennon (composed of earlier Beatle tribute material – "101 Strings play Hits written by The Beatles") in January 1981 marked the final 101 Strings effort. Many 101 Strings albums are simply orchestrated versions of pop hits and show tunes, although the early Somerset material contains many examples of the exotica and lounge genres. "Songs