Electronic musical instrument

Some tools make music with power.

They use electricity to make sound. You can use a keyboard to play notes.

This is like a piano. But it uses wires instead of strings. Some tools are played without touching them.

A Theremin is one such tool. It can make sounds that waver. These tools help us make many kinds of songs. They are used in most music today.

Electronic musical instruments make sound using electricity.

These tools are called electrophones. They send a signal to a power amplifier. This signal then goes to a loudspeaker. The speaker makes the sound we hear. Many people use a keyboard to play them.

This works like a piano. But a computer or a synth module makes the sound. Some instruments are very unique.

A Theremin is played without any touching.

It was built by Leon Theremin in 1919. The ondes Martenot is another special tool. It can make sounds that waver. It was made by Maurice Martenot in 1928. You can play it with a keyboard or a ring.

The Telharmonium was a very big machine. Thaddeus Cahill built it in 1897. One version weighed over 200 tons! It used metal wheels to make sounds. Today, electronic instruments are used in almost all music. They are found in pop and dance music. People still study ways to make new ones.

Electronic musical instruments, also known as electrophones, create sound using electronic circuits.

Instead of using vibrating strings or air, they output an electrical or digital signal. This signal travels to a power amplifier and then to a loudspeaker. The speaker turns that signal into the music we hear. Many players use a musical keyboard to control the sound.

This works differently than an acoustic piano. On a piano, keys hit strings with hammers. On an electronic keyboard, the keys talk to a computer or a synthesizer. These tools allow musicians to change the pitch, frequency, or length of every note.

There are many ways to make these sounds work. Some people use a music controller, which is a device used to input commands. This controller can talk to a separate synthesizer through languages like MIDI.

This setup lets the player separate the interface from the sound-making part. In the 21st century, these instruments are used in almost every kind of music. You can hear them in electronic dance music through drum machines or bass synths.

Scientists and artists still work together to invent brand new ways to play and create.

The history of these tools is full of surprising inventions. In the 1700s, people tried to add electricity to older instruments. The Denis d'or from 1753 used over 700 strings to enhance its sound.

Later, Elisha Gray invented the Musical Telegraph in 1876. He discovered he could control sound using an electromagnetic circuit. In 1906, the invention of the audion, or vacuum tube, changed everything. This small part helped people create and grow electrical signals for music and radio. It paved the way for many modern tools we use today.

Many famous instruments emerged during the early 1900s. Thaddeus Cahill patented the Telharmonium in 1897.

It used spinning tonewheels to make sounds and was incredibly huge. One version weighed more than 200 tons! In 1919, Leon Theremin built the Theremin in Leningrad. It is famous because it is the first instrument you play without touching it.

Maurice Martenot created the ondes Martenot in 1928. He wanted it to sound as expressive as a cello. These early machines showed how electricity could make endless new sounds.

These electronic tools connect to many things we already know. For example, the Hammond organ was inspired by the Telharmonium.

It used spinning metal wheels to create music. While it was made for churches, it became a huge part of jazz and blues. You might even hear the ondes Martenot in science fiction movies.

Modern artists like Radiohead and Daft Punk still use these kinds of sounds. From old vacuum tubes to new digital controllers, the journey of electronic music keeps growing.

An electronic musical instrument, often called an electrophone, produces sound through electronic circuitry.

Unlike acoustic instruments that rely on physical vibrations like strings or air, these devices output electrical, electronic, or digital audio signals. This signal is sent to a power amplifier. The amplifier then drives a loudspeaker to create the sound heard by listeners. Musicians use various interfaces to control these signals. They might adjust the pitch, frequency, or the duration of a note. This process makes electronic instruments a subset of audio signal processing applications.

Many players use a musical keyboard to interact with the sound. On an acoustic piano, keys are mechanically linked to swinging hammers that hit strings. On an electronic keyboard, the interface is linked to a synthesizer or a computer.

It is increasingly common to separate these functions. A musician might use a music controller as an input device. This controller communicates with a separate synthesizer using a musical performance description language. Two common examples are MIDI and Open Sound Control. This separation allows for a novel playing experience compared to mechanical keyboards.

Musicologists classify these instruments using the Hornbostel-Sachs system. In this system, electrophones are the fifth category of musical instruments. Sachs added this category in 1940 in his book, *The History of Musical Instruments*. He originally divided electrophones into three specific subcategories. The first group includes electrically actuated acoustic instruments, such as a pipe organ with electronic tracker action. The second group consists of electrically amplified acoustic instruments, like an acoustic guitar with a pickup. The third group includes instruments that make sound primarily through electrically driven oscillators.

Modern ethnomusicologists often suggest a different way to classify these tools. Researchers like Margaret Kartomi and Terry Ellingson argue for focusing on the initial sound source. They suggest only the third subcategory should remain as true electrophones. Under this view, a pipe organ remains an aerophone because air produces the sound. An electric guitar is a chordophone because strings create the vibration. This approach keeps the classification consistent with the original spirit of the Hornbostel-Sachs system. It focuses on what first creates the sound before electricity is involved.

History shows that musicians have experimented with electricity for centuries. In 1753, the Denis d'or used over 700 strings to enhance its sound.

Later, Jean-Baptiste de Laborde created the clavecin électrique in 1761. These early instruments used electricity to move parts, but not as a sound source. Elisha Gray invented the first electric synthesizer in 1876. His "Musical Telegraph" used an electromagnetic circuit to control sound. He even built a simple loudspeaker using a vibrating diaphragm. A major breakthrough arrived in 1906 with the invention of the audion. This vacuum tube allowed for the amplification of electrical signals.

The early 20th century saw a burst of incredible inventions. Thaddeus Cahill patented the Telharmonium in 1897.

This massive instrument used additive synthesis with spinning tonewheels. One version weighed over 200 tons and required thirty boxcars for transport. In 1919, Leon Theremin built the Theremin in Leningrad. It was unique because it was the first instrument played without physical touch.

Maurice Martenot created the ondes Martenot in 1928 to emulate the expressiveness of a cello. Other notable inventions included the Trautonium and the ANS synthesizer. The ANS synthesizer was built by Evgeny Murzin between 1937 and 1958.

These inventions changed how music is composed and performed. The Hammond organ, based on Telharmonium principles, became a staple in jazz and blues.

The Novachord was the first commercially manufactured synthesizer, built between 1938 and 1942. It offered 72-note polyphony using twelve oscillators. Today, electronic instruments are vital to almost all music styles. In electronic dance music, nearly all sounds come from synthesizers or drum machines.

Research continues in this interdisciplinary field. Specialized conferences now showcase cutting-edge work in new musical interfaces and controllers.