That's not universal, though. There are entire movements of art which rely on the premise of the idea or concept, being more important than its physical manifestation. For instance, Jackson pollock's paintings were not merely about how they looked, but about the persona of the male artist as an intuitive, intense and visible part of the work itself (one can look at the piece and know exactly how it was made). That's why the photographic images of him producing the work are so important. It's even more accentuated when you move out of the world of painting into conceptual art, installation art, and contemporary sculpture (see: Barry le Va, Mel Bochner, Bruce Nauman,etc.). Granted, there is still a physical form which carries the idea, but that's exactly what a record, tape or CD does, albeit in a stadardized form. But yeah, you are right, there certainly is a difference there too. Like you said, music is intangible, but a painting is, even if the idea it supports is not so physical. Hmmmm- What level of tangibility do you guys think a digital file, say, an mp3 file, has?