It's true that Ives used different styles rather than existed within them. That is profoundly different from the past, when composers were "imprisoned" in a sense within the musical thought and language of the time and slowly pushed the boundaries further. It has now reached what must be an endpoint, in the sense that now absolutely anything is possible in music. You can have medieval plain chant followed by white noise and no one will be surprised.
You mentioned Ligetti and that occurred to me also - he is one of the few of the current composers (current though getting rather old) who has actually created some new sounds - the use of microtonalities in the famous Lux Aeterna, Lontano, Atmospheres which interestingly did not mean only dissonance as he had consonances and unisons in those pieces. Other composers, like Schoenberg and many more recent ones, were literally afraid to use consonances because of their terror of being sucked back into tonal thinking. But nowadays, tonality, atonality, serialism, synthesized sound, pure noise - all of it is equal. Nothing is forbidden.
What this means is impossible to judge. How can you have "progression" from this? From infinity? In my own work I don't even think about any of the theoretical approaches. I could never write a thing if I did. I work in a style I know is very old-fashioned in many ways simply because it is engrained in my approach somehow. It is not possible for me or I believe for any composer today to believe he is at the "forefront" of things, and maybe that is a good thing because all of the different styles throughout history have values of their own.
You mentioned Ligetti and that occurred to me also - he is one of the few of the current composers (current though getting rather old) who has actually created some new sounds - the use of microtonalities in the famous Lux Aeterna, Lontano, Atmospheres which interestingly did not mean only dissonance as he had consonances and unisons in those pieces. Other composers, like Schoenberg and many more recent ones, were literally afraid to use consonances because of their terror of being sucked back into tonal thinking. But nowadays, tonality, atonality, serialism, synthesized sound, pure noise - all of it is equal. Nothing is forbidden.
What this means is impossible to judge. How can you have "progression" from this? From infinity? In my own work I don't even think about any of the theoretical approaches. I could never write a thing if I did. I work in a style I know is very old-fashioned in many ways simply because it is engrained in my approach somehow. It is not possible for me or I believe for any composer today to believe he is at the "forefront" of things, and maybe that is a good thing because all of the different styles throughout history have values of their own.