Aside from one clever piece for marbles and piano from the Fluxus Anthology 30th Anniversary box, these recordings are the first I've heard of Mieko Shiomi on her own (She is also a founding member of Group Ongaku). And that's somewhat appropriate, as these recordings come 10 years after those and act as a 40th anniversary gift to the original Anthology. The disc is an encyclopedia of Fluxus participants and in itself a nice Fluxus exercise: Shiomi has set up rules for the overall structure (detailed below in her notes) and interjected where appropriate details that represent each subject. The piece "George Brecht", for instance, is built from sounds not unlike dripping water. "La Monte Young" is a sustained chord built from the notes A, E, and G. What else would "Ben Patterson" be built from but the sounds of a double bass?
If that weren't enough, here is a brief read by Dick Higgins, just for some context in simple terms.