I was in a debate over whether noise was music or not. She said there's no rhythmic structure in noise, so it's not music. I retorted that if that's the case, free jazz and some drone doom isn't music, as it doesn't hold a beat. She then said it wasn't because it's got no notes in it. I said that that isn't always true, and based on that assumption, primitive african drumming isn't music either, as though it has rhythmic structure, it originally had no vocals.