
Matt F. answered 06/18/19
Professional Composer
I'd recommend Peter Bürger's Theory of The Avant-Garde to think through your questions with. What you're asking about is hermeneutics - the discussion of the interpretation of music. In simple terms hermeneutics can be described by the idea that we know a piece of text is a poem because we've seen a poem before. There can be music that is in conflict with our interpretive framework, in dialogue with an excluded music, a commentary on an existing principle, synthesis of other forms, experimentation with new mediums the list goes on. I am not aware of a form of music that has nothing to do with what came before it however, because that would require the person writing it and the person listening to it to have absolutely no exposure to the music of their time - music's meaning and classification is not up to the composer! You could think you created a totally new genre, but if a group of listeners decide that they hear a link, a disagreement, a commentary with something in existence already, they have as much agency to classify the music as you do. The closest I can think of is early electronic music which was very much driven by the technological advancement of the time, and yet even that was in dialogue with the expectations of what music should be - and therefore not severed from the previews forms.