HERMANN SCHROEDER, Musik für Orgel (1984). Schott 9848. The title "Music for Organ" is an editorial mischief, the manuscript title Musik im 5er, 7er und 12er Raum having apparently been deemed too esoteric for ordinary consumption. Yet Schroeder's musical Raumen (tonal spaces, or "domains") are the most interesting aspect of these posthumous pieces. They are entitled "Toccata pentatonica," "Scala heptatonica," and "Ciacona dodekatonica (sic)." Through the Raumen, Schroeder wanted to assimilate twelve-tone concepts without "going all the way," but his theory is better than its practice, and otherwise these pieces represent little more than common pentatonic and diatonic modes. Even in the ostensibly chromatic chaconne, the most telling harmony is the parallel fourth, and one seeks in vain for much in the way of color, humor, or expression.