It is also a completely ridiculous assertion. Most of the music I listen to has almost nothing to do with "forms of felt life becoming publicly perceptible". Some people create music with the goals being shaped by abstract aesthetics that have little or nothing to do with "felt life".

I think it's great to understand that some or even lots of music can be described in a particular way, but I very much doubt that there is any description other than "sound arranged in time and space" that covers all music.