Brass instrument can be very useful for a 1st or 3rd horn player, who uses the F side less. Another approach was the addition of two sets of slides for different parts of the range. Some euphoniums and tubas were built like this, but today, this approach has become highly exotic for all instruments except horns, where it is the norm, usually in a double, sometimes even triple configuration. Some valved brass instruments provide triggers or throws that manually lengthen (or, less commonly, shorten) the main tuning slide, a valve slide, or the main tubing. These mechanisms alter the pitch of notes
Tenor horn bell easily rotated to point in the direction of the player's choice. The standard bell-up horn comes in two basic shapes, one with the beginning of the bell looping over the top of the valves and the other looping below the valves. These types are the most frequently encountered in the United States and UK. Only the standard upright instrument is seen in UK brass bands. In Europe, Červený have been manufacturing tenor horns since 1852. They currently offer models of the instrument looped like a classic horn and an oval model shaped like a Wagner tuba, all models having