Invention of the telephone
The carbon microphone was independently developed around 1878 by David Edward Hughes in England and Emile Berliner and Thomas Edison in the US. Although Edison was awarded the first patent in mid-1877, Hughes had demonstrated his working device in front of many witnesses some years earlier, and most historians credit him with its invention.
Giorgio by Moroder
When Moroder arrived in the studio to record his monologue, he was initially perplexed that the booth contained multiple microphones; he wondered if the extra equipment was a precaution in case one of the microphones broke. The recording engineer explained that the microphones varied with origin dates that ranged from the 1960s to the 21st century, and that each microphone would be used to represent the different decades in Moroder's life. The engineer added that although most listeners would not be able to distinguish between each microphone, Bangalter would know the difference. Nile Rodgers was also present during the voice recording sessions, which took place over the course of two days.