| The cornet is a conical instrument, meaning that the tubing gradually gets bigger all the way through the horn. A trumpet is basically a cylindrical instrument, meaning that much of the tubing is the same diameter. A cornet gets a more mellow tone than a trumpet.
I'm not sure how switching to a cornet will help the left hand problem. The valve cluster is about the same size, I believe.
__________________ "Music is a fire in your belly that has to come out of your mouth, so you'd better put a horn in the way before someone gets hurt" (paraphrase of Bleeding Gums Murphy) |