Don - Most wind instruments, or at least their 'forebears' were originally played anally. The technique diminished in popularity over the centuries as diet changed, but far fewer instruments were stolen in the 'good olde days', and it was relatively safe for the average sackbut...er.. ist to leave his back door unguarded. This, obviously, is the origin of the well-known expression "bum note", and the oft-heard cry from the audience: "Why don't you try sticking it up your arse mate, it might sound better."