Roman Haubenstock-Ramati, Vermutungen / Credentials / Tableau I (side A)

This 1970 LP contains pieces by Haubenstock-Ramati over a 10 year period.  Side A consists of one long piece, "Vermutungen über ein dunkles Haus".  It's impressively dynamic and spacious, with great use of sweeping sounds and textures alternating with percussion and other discrete strikes.  The piece's excellent use of color does not provide a clear structure over its lengthy duration—it feels a bit more like a study than a finished work.  The two shorter pieces on side B are more uniform in style.  "Credentials" includes exaggerated vocalizing from Cathy Berberian and matches the instrumental arrangement to this style—while not to my taste, it's excuted well.  "Tableau 1" is a more uniformly dense and less dynamic piece than the first two.  The recordings are well captured in a great sounding room.  The album comes with 4 pages of liner notes that seem informative, but my inability to read German diminishes their value to me.