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 replacement for the French horn. In the past, many publishers included parts in both Eb (for the tenor horn) and F (for the French horn). These parts were the same, just transposed into the pitch of the given instrument. Some publishers still follow this practice. Although Gustav Mahler orchestrated his Seventh Symphony to include one "tenorhorn in B", that instrument is more akin to the baritone horn. Partial list of solo repertoire: Tenor horn The tenor horn (British English; alto horn in American English, Althorn in Germany; occasionally referred to as E horn) is a brass instrument in the saxhorn