This trio left only one - excellent - official recording "Seven Compositions".
Culled from an analog radio broadcast in really good sound quality.
Braxton offers the music as an mp3 download for members of his website.
Here you'll get it in flac.
Anthony Braxton, reeds
Adelhard Roidinger, bass
Tony Oxley, percussion
1. Composition No 6A / 40G(+87) / 110A(+63) (44:34)
2. The Angular Apron / Composition 40J (33:10)
3. Composition 40M (17:13)
4. applause (00:35)
Recorded March 11,1989, Wuppertal, Germany.