May 2022; this has been in the C.P. ranks for as long as we've been aware of the original 1971 LP, a compilation featuring one piece each by 4 Swiss Electro-Acoustic Composers. While on its own a fantastic rundown of Early Electronic work, its discovery opened the floodgates & led to a decade-long research project in which each composer's supplemental, relevant work was discovered & obtained, leading to an entire second disc of materials by all four. 

So, in addition to their pieces on the "Musiques Electro Acoustiques Et Instruments" LP, you get (in order) André Zumbach's "Chronophonie" (from "MicroMegas VI" "Split" w/ Joseph Haydn), the entirety of Werner Kaegi's 1971 "Vom Sinuston Zur Elektronischen Musik" 7", the excerpt from Eric Gaudibert's "Each One His Own Ape" (1973 - 1974) from the "Contemporary Music From Switzerland" 2LP, and finally an excerpt of Bernard Schule's "Passage au Zénith" as issued on a Kiosque D'Orphee single featuring performances by the Choeur des écoles de Pully. 

Think of it as a premature "réédition" of an unfinished title from years back; essentially a "Stone Soup" edition using the "Musiques Electro Acoustiques" as the initial seed. Comes with a 4-panel replica insert of the inset booklet of the Kaegi EP, subtitled "Eine Einführung in die Technik der elektronischen Musik."