Well yeah, the invention of microphone was really one of the main things that made 20th century popular music different from what came before. I think it was mentioned in some other thread that one of the reasons Bing Crosby is considered such an influential singer is because he was among the first to make use of the microphone to produce types of "quiet" singing that weren't possible before.
― Tuomas, Sunday, 15 February 2009 21:43 (fifteen years ago) link