I have a question about efficiency. It seems some horns are easier to make speak, or perhaps require more or less effort on the part of the player. I have read lots of posts and articles and seen many videos and reviews where players write or talk about the efficiency of a trumpet. I understand that the greatest variable in the equation is the individual playing the horn, but I wondered what other factors impact the efficiency of a horn. I'm guessing that my question will probably have a very multi-faceted answer, but I am hoping to gain a better understanding of how the materials and design of a particular trumpet might affect the physics of the horn in a way that influences the efficiency that the player experiences when the horn is played.