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
Guqin strings manufacture situation of silk strings is not. Throughout the ages, particularly the political disturbances of the twentieth century as well as the popularity of the metal-nylon strings, has seen silk string manufacture decline. Plus the difficulty in obtaining the best quality silk and the difficulty in obtaining a high quality throughout has brought about only short phases now and again of silk string manufacture. There has been efforts to produce silk strings to the quality and standard that they were before the disruptions. Wong Shu-chee led the first serious undertaking to produce good quality silk strings around the turn of