Musical Aphorisms (Refutations / Barrel Organ Pieces) / Second Night Music. Theory of New Music: nineteen contributions to new music, including atonality, linear counterpoint, harmony of fourths, Klangfarbenmelody, musical expressionism, musical new objectivity, twelve-tone technique, community music, forms in new music, motoric, jazz, dissonance in new music, chamber orchestra, new polyphony, musical impressionism, new music, construction in new music, polytonality, and musical neoclassicism. Atonal Intermezzo? Against the new tonality. Digressions on a digression. Why twelve-tone music? Development and forms of new music. New music today. On the state of composition in Germany. On the relationship between painting and music today. On the current relationship between philosophy and music.