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
Hans Felix Husadel alto slide trombone. Tenor and baritone Tuba were modified so their bells faced forward, with the mechanics of the instruments adjusted to allow better handling while on the march. The traditional rotary valves on bass trumpets were also replaced with pump valves. The openings of the higher pitched brass instruments were narrowed to achieve greater sharpness and clarity of sound. The effect was to give Husadel's Luftwaffe bands a unique timbre with strong and varied middle voices. Husadel’s bands chose silver-plated instruments, giving them a modern look compared to the standard army and navy band instrument brass finishes. Husadel's Luftwaffe