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
Oom-pah a song named "Oom-Pah-Pah", which is named after the oom-pah. A more modern variation is the playing of contemporary pop and rock songs in an Oompah style, by bands such as Global Kryner (Austria) and Oompah Brass (UK) (who dubbed the style "Oompop"). Oom-pah Oom-pah, Oompah or Umpapa is the rhythmical sound of a deep brass instrument in a band, a form of background ostinato. The oom-pah sound is usually made by the tuba alternating between the root (tonic) of the chord and the 5th (dominant) — this sound is said to be the "oom". The "pah" is played on