Alfred Harth had founded the club H in 1965 and then the meeting point and platform centrum freier cunst in Frankfurt/Main starting with his essay "On Synaesthetics" in 1967 and the vision of synthesizing avant-garde art, avant-garde music and avant-garde literature. It became an open exchange and performance place for young experimental artists, poets and musicians in the Frankfurt area with the Just Music ensemble as a main creative pool. American clarinetist Tony Scott played there with Just Music and also in the following years Harth and Just Music kept open to perform with many others as the German musicians trumpetist and composer Michael Sell (with the Free Jazz Group Wiesbaden), saxophonist Peter Brötzmann and tuba and bassplayer Peter Kowald, Czech flutist Jiri Stivin, members of the AACM, Polish violinist Zbigniew Seifert, American saxophonist Anthony Braxton a. o. In 1969, Just Music recorded the 2nd LP (1002) for Manfred Eicher's label ECM and Thomas Cremer, Harth and Thomas Stöwsand made a joint performance with the Nicole Van den Plas Trio from Belgium at the San Sebastian Jazz Festival in Spain. From then on Just Music also worked in cooperation with members of the Nicole Van den Plas Trio. In 1971 Harth and Van den Plas started to focus on duo works and in 1972 with guests as Peter Kowald and drummer Paul Lovens a. o. in Belgium which later in the same year lead to the foundation of the group E. M. T. when Just Music had performed their last concerts with partly exchanged members in Poland.