When Mozart was composing at the end of the eighteenth century, the city of Vienna was so quiet that fire alarms could be given verbally, by a shouting watchman mounted on top of St. Stefan's Cathedral. In twentieth-century society, the noise level is such that it keeps knocking our bodies out of tune and out of their natural rhythms. This ever-increasing assault of sound upon our ears, minds, and bodies adds to the stress load of civilized beings trying to live in a highly complex environment. - Steve Halpern