An ambitious project and a good start. But there is so much left. The credit-card roller cachunk-cachunk when the carbon was pressed into the card at every cas

An ambitious project and a good start. But there is so much left. The credit-card roller cachunk-cachunk when the carbon was pressed into the card at every cash register station. The sound of a floppy spinning up. The ding of an old-fashioned gas pump. The whine of a tube TV flyback transformer! If smell can conjure up long-forgotten images and experiences, what of sound? It has to be a close second.