All mouthpieces are made using specially designed computer-controlled machines. If it were not flared, the tone would not project well and it would sound dull and muted. Lacquered trumpets produce harder, darker sounds. Silver-plated trumpets produce brighter sounds with more projection. Gold-plated trumpets produce soft, dark but still and relatively resonant sounds.
Pitch varies according to parameters such as the shape and length of the tubing.
When the pistons are released, air passes through the shortest path and the entire length of the trumpet is at its minimum length. When a piston is pressed, the entire length of the pipe increases by the length of the valve slide, resulting in a lower pitch. Yamaha exports trumpets to nearly all parts of the world. Yamaha trumpets are sold through local dealers in almost all countries.