his own senses tuned to maximum , he let his other intrusions , penetrations , and abuses set up an aleatoric chorus , cycling mindlessly through the peaks and troughs of their parameters , and fucked her until he came ... ... a great white-out of overloaded sensory input , sharp and featureless , dissolving into a glittering starfield of snow-crash , and finally the pleasing hum of residual harmonics , as if he were visualizing the pitches played by an orchestra tuning up : random and pointillistic at first , then coalescing around a single note of reference .