“Diaphonia” refers to the harmony, motivic work, formal structure, instrumental arrangement in space, instrumentation, and use of live electronics.

Part 1: The tritone is the harmonic basis. At the center is a gestural quotation from Luciano Berio's Sinfonia, which structures the individual sections in varied forms. In addition to the interval structure based on the tritone, two “motifs” form the basis for the musical-gestural action, which repeatedly oscillates between the soloists, individual orchestra groups, and the tutti.
Part 2: An intermezzo for piano with live electronics and four percussionists. “Auseinanderklang” (dissonance) here refers to sound transformations of the piano and their spatial projection. The cyclical five-part movement is a composed downward glissando, starting with high metallic sounds (crotales) at the beginning and ending with low piano sounds, supported by low metallic and skin noises.
Part 3: The basic interval is the seventh. Formally cyclical (A - B - C - D - C' - E - A'), live electronic sections (B - D - E) are enclosed by fast rhythmic orchestral tutti. In these, the Berio quotation is revisited in a modified form. Different spatial projections combined with transformations in the solo sections (B: flute/cello; E: bass clarinet, violin) motivated by live electronics contrast with the central section (D), in which a complex overall sound impression is created between the orchestra and electronics.
Part 4: Beginning with a string quartet accompanied by woodwinds, different spaces are created electronically. In accordance with the basic interval of the second, the two halves of the orchestra face each other in the second section with their complementary whole-tone scales. In the final section, the second is gradually “filled in” with microintervals, with the soloists drawing on motifs from the first part.


CD:
SWF-Sinfonieorchester Baden-Baden, cond. Michael Gielen
CD col legno WWE 31898