A horn makes music. 
A horn is a musical tool. 
Long ago, people used real animal horns. They blew into them to make noise. This helped them hunt or send signals.
Some horns are made of wood. The alphorn is a very long wooden horn. 
Other horns are made of metal. They can be curved into a circle. This makes them easier to carry.
Today, many people play horns in bands. They make beautiful music for us to hear.
A horn is a family of musical tools. Most are made of metal tubes. 
Long ago, people used real animal horns. A shofar is a horn from a ram. It is used in Jewish religious rituals. 

Some horns are made of wood. The alphorn is a very long wooden horn. 

Early metal horns were simple. Some were shaped like a letter C. These were called cornu by the Romans. 
A horn is a family of musical instruments made of a tube. Most are made of metal and often curve in many ways. 
To make a sound, a person blows into the mouthpiece. In early metal horns, players changed the pitch using only their lips. 
Long ago, people used the actual horns of animals. 

Many different types of horns exist in history. The Romans used curved horns called the cornu and the buccina. 

Horns have changed a lot over many years. In the 1600s, hunters needed horns they could play on horseback. They made them in a spiral shape called a cor à plusieurs tours. 

A horn is a broad category of musical instruments. Most are made from a long tube. These tubes are usually crafted from metal. They are often curved in various ways. One end of the tube is narrow. This is where the musician blows. The other end is wide. This wide part is called the bell. The bell allows the sound to emerge. 
To produce sound, a musician blows into a mouthpiece. In early metal horns, players used their lips to change pitch. These instruments did not have valves until the 19th century. Without valves, a player can only play notes from the harmonic series. This limits the ability to play in different keys. To solve this, musicians used crooks. A crook is a section of tubing with a different length. It is inserted between the mouthpiece and the lead pipe. This increases the total length of the instrument. It also lowers the pitch.
There are many distinct types of horns. Some are made from animal parts. The shofar is a ram's horn used in Jewish rituals. In the Middle Ages, people used the olifant. This was an ivory horn made from elephant tusks. These reached Europe from Byzantium in the 10th or 11th century. They became symbols of royalty. 
Metal horns have a very long history. Archaeologists found bronze lurer horns in Scandinavia. These date back to the 10th century BC. Many were found in pairs. These pairs often curved in opposite directions. 

By the 17th century, hunting horns became more complex. Hunters needed to play while on horseback. They needed long tubes for high notes. But they also needed the instrument to be portable. Two main styles emerged. One was the trompe, which had a crescent shape. The other was the cor à plusieurs tours. This was a tightly coiled spiral instrument. 
In the 18th century, horns became part of orchestras. Johann Mattheson noted their popularity in 1713. He said they were fashionable in church and theater music. He felt they were more poetic than trumpets. He also noted they were less deafening. The horns had a pitch a perfect fifth lower than trumpets. By the 1700s, the crooked horn appeared in England. It was often called the "German horn." This was because many German musicians played it. 
Today, the horn family includes many specialized instruments. There are saxhorns, such as the alto horn and baritone horn. There are also large instruments like the tuba and the sousaphone. Some horns use rotary valves. These valves allow for much more complex music. The horn remains a vital part of many musical traditions. It connects ancient signaling tools to modern orchestral masterpieces.
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