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
Konzertmusik for Brass and String Orchestra – Im ersten Zeitmaß (Fast – Slow – Tempo primo) The score of this work calls for 4 French horns in F, 4 trumpets in C, 3 trombones, bass tuba and a four-section string orchestra of violins, violas, cellos and double basses. Konzertmusik for Brass and String Orchestra The "Konzertmusik" for String Orchestra and Brass, Op. 50, is a work by Paul Hindemith, composed in 1930. It was one of a large group of pieces commissioned for the 50th anniversary of the Boston Symphony Orchestra by its music director, Serge Koussevitzky (others include the Piano Concerto in G major by