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 Orchestra" began releasing a series of CDs (including a two-volume Beatles set). 101 Strings compilations were reissued on CD during the "lounge revival" of the 1990s. Few 101 Strings LPs have been re-released in their original form. If one goes to the Madacy site to view their 101 Strings collection, exactly the same description that was used on the Bel Canto's ST- 76 two track stereo release about the 101 Strings sound is reprinted. The 50 Hz hum heard on many of those tape recordings was due to the Ampex 350's filtering which was not well suited for European 50