A brass instrument is a musical instrument A musical instrument is constructed or used for the purpose of making the sounds of music. In principle, anything that produces sound can serve as a musical instrument. The history of musical instruments dates back to the beginnings of human culture. The academic study of musical instruments is called organology whose sound is produced by sympathetic vibration Sympathetic resonance is a harmonic phenomenon wherein a formerly passive string or vibratory body responds to external vibrations to which it has a harmonic likeness. The classic example is demonstrated with two similar tuning-forks of which one is mounted on a wooden box. If the other one is struck and then placed on the box, then muted, the un- of air in a tubular resonator A resonator is a device or system that exhibits resonance or resonant behavior, that is, it naturally oscillates at some frequencies, called its resonant frequencies, with greater amplitude than at others. The oscillations in a resonator can be either electromagnetic or mechanical . Resonators are used to either generate waves of specific in sympathy with the vibration of the player's lips. Brass instruments are also called labrosones, literally meaning "lip-vibrated instruments".[1]

There are two factors in producing different pitches on a brass instrument The following is a comparison table of the pitch of the common brass instruments in descending order of pitch. Whereas it is usually quite easy to determine whether an instrument is pitched in, say, F or B♭ or E♭, it is not always obvious which octave of F or B♭ is being referred to. In the following table, the second harmonic is presented: One is alteration of the player's lip tension (or "embouchure The embouchure is the use of facial muscles and the shaping of the lips to the mouthpiece of a wind or brass instrument"), and air flow. The second is the use of slides or valves A valve is a device that regulates the flow of a fluid by opening, closing, or partially obstructing various passageways. Valves are technically pipe fittings, but are usually discussed as a separate category. In an open valve, fluid flows in a direction from higher pressure to lower pressure to change the length of the tubing, thus changing the harmonic series Pitched musical instruments are often based on an approximate harmonic oscillator such as a string or a column of air, which oscillates at numerous frequencies simultaneously. At these resonant frequencies, waves travel in both directions along the string or air column, reinforcing and canceling each other to form standing waves. Interaction with presented by the instrument to the player.

The view of most scholars (see organology Organology is the science of musical instruments and their classification . It embraces study of instruments' history, instruments used in different cultures, technical aspects of how instruments produce sound, and musical instrument classification. There is a degree of overlap between organology, acoustics and ethnomusicology (each of the) is that the term "brass instrument" should be defined by the way the sound is made, as above, and not by whether the instrument is actually made of brass Brass is any alloy of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties. In comparison, bronze is principally an alloy of copper and tin. Despite this distinction some types of brasses are called bronzes and vice-versa. Brass is a substitutional alloy. It is used for decoration. Thus, as exceptional cases one finds brass instruments made of wood like the alphorn The alphorn or alpenhorn or alpine horn is a labrophone, consisting of a natural wooden horn of conical bore, having a wooden cup-shaped mouthpiece, used by mountain dwellers in Switzerland and elsewhere. Similar wooden horns were used for communication in most mountainous regions of Europe, from French Switzerland to the Carpathians, the cornett The cornett, cornetto or zink is an early wind instrument, dating from the Medieval, Renaissance and Baroque periods. It was used in what are now called alta capellas or wind ensembles. It is not to be confused with the trumpet-like instrument cornet, and the serpent A serpent is a bass wind instrument, descended from the cornett, and a distant ancestor of the tuba, with a mouthpiece like a brass instrument but side holes like a woodwind. It is usually a long cone bent into a snakelike shape, hence the name. The serpent is closely related to the cornett, although it is not part of the cornett family, due to, while some woodwind instruments A woodwind instrument is a musical instrument which produces sound when the player blows air against a sharp edge or through a reed, causing the air within its resonator to vibrate. Most of these instruments are made of wood, but can be made of other materials, such as metals or plastics are made of brass, like the saxophone The saxophone is a conical-bored transposing musical instrument that is a member of the woodwind family. Saxophones are usually made of brass and played with a single-reed mouthpiece similar to that of the clarinet. The saxophone was invented by the Belgian Adolphe Sax in 1841. He wanted to create an instrument that would both be the most powerful.

Contents

Families of brass instruments

Modern brass instruments generally come in one of two families:

There are two other families that have, in general, become functionally obsolete for practical purposes. Instruments of both types, however, are sometimes used for period-instrument performances Historically informed performance (also referred to as period performance, authentic performance, or Historically Informed Performance Practice ) is an approach, or movement, in the performance of classical music. Members of this movement usually play on period instruments, and utilise historical treatises, as well as additional historical of Baroque- or Classical-era pieces. In more modern compositions, they are occasionally used for their intonation or tone color.

Bore taper and diameter

Brass instruments may also be characterised by two generalizations about geometry of the bore, that is, the tubing between the mouthpiece and the flaring of the tubing into the bell. Those two generalizations are with regard to

Cylindricality vs. conicality

While all modern valved and slide brass instruments consist in part of conical and in part of cylindrical tubing, they are divided as follows:

Whole-tube vs. half-tube

The second division, that based on bore diameter in relation to the length[2] determines whether it is the fundamental tone or the first overtone which is the lowest partial practically available to the player:

Neither the horns nor the trumpet could produce the 1st note of the harmonic series ... A horn giving the C of an open 8 ft organ pipe had to be 16 ft (5 m). long. Half its length was practically useless ... it was found that if the calibre of tube was sufficiently enlarged in proportion to its length, the instrument could be relied upon to give its fundamental note in all normal circumstances. - Cecil Forsyth, Orchestration, p. 86 [3]

Some other brass instruments

The instruments in this list fall for various reasons outside the scope of much of the discussion above regarding families of brass instruments.

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