Who made Hi-Fi?

Who exactly was the mastermind behind the creation of Hi-Fi technology? Did it emerge from the minds of a single inventor, or was it a collaborative effort between multiple engineers and researchers? Was it a revolutionary breakthrough, or a gradual evolution of existing audio technology? And what inspired the development of Hi-Fi in the first place - was it a desire for better sound quality, or was it driven by commercial interests? I'm eager to learn more about the origins of this influential technology and the individuals who made it possible.