I did not fall back upon cymbal tremoli to "mediate" between the two, no mallet sound to reconcile the different timbres, no tam-tams to provide depth or triangles to supply lighter sound colours – just two naked sound sources which can only be modified in their dynamics and in the contrast between dry and echoed sound: that is all to lend more plasticity to the musical argument. They do, however, trigger off some chain reactions of their own.