same year Harth made an LP Melchior with his theatre composition for Frank Wedekind's play Spring Awakening at National Theatre Mannheim played by Bob Degen and himself and Cassiber put out its second CD, Beauty and the Beast, released in Germany and Great Britain. In 1987 the Duo Goebbels/Harth had been recorded live at the Festival International de Musique Actuelle de Victoriaville in Canada and came to an end in 1988. In 1992 Harth managed to put out a best-of album in Japan, Goebbels Heart, and in 2007 a double CD of the duo's first two LPs, in Great Britain. Parallel to the collaboration with Heiner Goebbels, Harth founded several groups during the 1980s, including a two time working project (LP This Earth! on ECM 1264 in 1983) with Paul Bley, Trilok Gurtu, Maggie Nicols, Barre Phillips and himself, then Notes On Planet Shikasta (1987, without Gurtu, additive Phil Minton) using fragmented words by Doris Lessing, and an international group Gestalt et Jive (1984 to 1988). In 1984 Harth co-organized the Marry the World By Conference Call at the gallery ‘waschSalon’ which he maintained during the years 1984 to 1991, and where he also had invited William S. Burroughs for an exhibition of his Paintings On Paper. In 1985 Harth adapted the number 23 in his name and short name A23H. In 1986 A23H cooperated at the first under water concert organized by Micky Remann in a pool in Frankfurt (Guinness Book of Records). Harth had a duo with John Zorn, and a trio with Peter Brötzmann and Sonny Sharrock in 1986/7. In 1989 Harth created the performance Wenn Gott tot ist, dann ist er im Himmel with a sound collage of original interviews with Jean Baudrillard, Villem Flusser, Friedrich Kittler a.o., and composed the CD Sweet Paris in 1990 which implements recorded German texts read by foreign language speaking street pedestrians in Paris. During the transition phase of the opening of the East Harth was a member of Lindsay Cooper's group Oh Moscow (1987 to 1993, words by singer and film director Sally Potter), he had founded a postmodern group Vladimir Estragon (1988/89, comprising Einstürzende Neubauten drummer FM Einheit) referring in its titles to Samuel Beckett and James Joyce, a Trio Trabant a Roma (1990/1, Lindsay Cooper, Phil Minton, himself), a duo Parcours Bleu a Deux with Heinz Sauer (1990 to 1992), and a QuasarQuartet (1992/3, Simon Nabatov, Vitold