The vuvuzela idea (culture?) developed through two routes. In the Cape (South) the fishermen would hawk their fish in the suburbs on carts. They'd blow through a dried piece of kelp, like one would a bugle, and housewives would send their children to buy the 'fish of the day'',mostly snoek. So the monotone is well known from childhood.Now in the North, the Africans had a 'crier' who brought news, opened ceremonies, etc. There they use a Kudu horn, a long, spiral antelope horn also blown like a bugle (as the Pacific Island conch- shell) So it came naturally to use a similar instrument to 'voice' support for a sports team. The question is though, if it's a bugle, why can't they play a tune?