A noise that conveys a feeling, no matter that feeling, is music.
Sure, I don't sit around jamming to John Cage, but I similarly feel vaugely ambivilant about much pop music. Is it any different? Much good hiphop is atonal, much jazz does not repeat, and much popular techno has but a faint hint of "humanity". And yet they are not just music, but wildly popular styles. there are few qualifiers you can put on music, art, etc. without drifting dangerously into 'I know it when I see it' territory.