"Ramifications" (1968–69), completed a year before the Chamber Concerto, is scored for an ensemble of strings in twelve parts—seven violins, two violas, two cellos and a double bass—each of which may be taken by one player or several. The twelve are divided into two numerically equal groups but with the instruments in the first group tuned approximately a quarter-tone higher (four violins, a viola and a cello). As the group play, the one tuned higher inevitably tends to slide down toward the other, and both get nearer each other in pitch.