What influence has technology had on music in the western world?

My question at this point is something like, “What influence has technology had on music in the western world?”. This does seem like a bit of a broad topic, but I don't want to make it so narrow that I don't have enough to talk about. This is completely different from my original question, which I don't even really remember at this point. Actually, I think it was something like, “What makes popular music popular and what separates the pop genre from other genres that still become popular?”, or something like that. It wasn't a very well-worded question, and I felt a bit limited, especially after seeing most everyone else's questions having some sort of regard for technology in them. I found some articles related to the radio, the computer, and the electric guitar, so those alone should be very helpful in organizing my essay. Maybe I can organize it by talking about certain technological advances, one at a time, or perhaps I could format it as a sort of timeline in essay form. I can talk not only about the way the pieces of technology changed the way people listen to music, but the way they write it as well. With the invention of the electric guitar and other electric instruments, music began to get louder and more aggressive over time. That had a big influence on the creation of many genres, which in turn has an effect on what people hear and how they write new popular music. The use of computers in music influences people to write perfect sounding music that may not be realistically feasible, but is possible thanks to the power of computers. New sounds and techniques are also available thanks to the rise of computers. I don't have to mention every single piece of technology that has ever had an effect on music, but I think that the electric guitar, the radio, and the computer are a good start at least.