The latter was a keyboard instrument with plectra (picks) activated electrically.
However, neither instrument used electricity as a sound-source.
The first electric synthesizer was invented in 1876 by Elisha Gray.
In the 18th-century, musicians and composers adapted a number of acoustic instruments to exploit the novelty of electricity.
Thus, in the broadest sense, the first electrified musical instrument was the Denis d'or, dating from 1753, followed shortly by the clavecin électrique by the Frenchman Jean-Baptiste de Laborde in 1761.
The former instrument consisted of a keyboard instrument of over 700 strings, electrified temporarily to enhance sonic qualities.
All electronic musical instruments can be viewed as a subset of audio signal processing applications.
Simple electronic musical instruments are sometimes called sound effects; the border between sound effects and actual musical instruments is often hazy.
Electronic musical instruments are now widely used in most styles of music.
Development of new electronic musical instruments, controllers, and synthesizers continues to be a highly active and interdisciplinary field of research.
An electronic musical instrument is a musical instrument that produces sound using electronics.
Such an instrument sounds by outputting an electrical audio signal that ultimately drives a loudspeaker.
An electronic instrument might include a user interface for controlling its sound, often by adjusting the pitch, frequency, or duration of each note.
However, it is increasingly common to separate user interface and sound-generating functions into a music controller (input device) and a music synthesizer, respectively, with the two devices communicating through a musical performance description language such as MIDI or Open Sound Control.