How did music change from the 1960s to the 1970s?

As the artists started looking for sounds that were more and more extreme, you had technology kind of catching up. Whereas in the 50s and early 60s you had two-track studios and four-track studios, by the mid to late 60s you had eight-track studios and 16-track studios. This meant they had more electronic capability for recording which meant you had more instrumentation. You had synthesizers being more and more prevalent and you had bands really taking total control and doing whatever they could think of. Sometimes this led to really complicated music like the progressive rock of the late 60s and early 70s. Bands like Yes, King Crimson, Genesis and Emerson Lake and Palmer would do these long song cycles, which was really complicated classical music mixed with rock music. They would have all these really elaborate concepts and the concept albums. As good as David Bowie is, what a lot of people took from him was the idea of theatrics. Staging live music became more elaborate and there were now costumes and all that stuff. By the late 70's you had punk rockers in New York, and later in England, eventually catching onto the fact that you could just sit down with an electric guitar and drums and just bash out whatever you're feeling or whatever you wanted to talk about. You didn't have to be one of these costumed virtuosic musicians.