What Is Electronic Music?

Electronic music is a field of musical practice and audio engineering concerned with the creation and manipulation of sound using electronic circuits, digital signal processing, and computer-based synthesis, rather than exclusively acoustic instruments. It spans both the compositional discipline of organizing electronically generated sounds into musical works and the engineering discipline of designing the hardware and software that produce those sounds. The field draws on electrical engineering, acoustics, psychoacoustics, and computer science, and has shaped both concert music and popular culture since the mid-twentieth century.

The lineage of electronic music reaches back to the late nineteenth century. Thaddeus Cahill's Telharmonium, an electromechanical organ demonstrated in 1906, and Leon Theremin's eponymous instrument, introduced in 1920, were among the first devices to generate musical tones through electrical means. The tape recorder enabled an additional creative dimension in the 1940s and 1950s: Pierre Schaeffer in France developed musique concrète by recording acoustic events and manipulating the tape to produce new sonic objects, while Karlheinz Stockhausen in Germany explored purely electronically synthesized timbres at the WDR electronic music studio in Cologne.

Sound Synthesis

Sound synthesis is the process of generating audio signals from mathematical or circuit-based models rather than from acoustic vibration. Analog subtractive synthesis, the basis of instruments such as the Moog synthesizer (introduced in 1964), generates harmonically rich waveforms from voltage-controlled oscillators and filters them through voltage-controlled filters and amplifiers to shape timbre. Frequency modulation (FM) synthesis, developed by Stanford University engineer John Chowning in the 1960s and commercialized in the Yamaha DX7 digital synthesizer released in 1983, generates complex timbres by modulating the frequency of one audio-rate signal with another. Later techniques include wavetable synthesis, which cycles through stored waveform snapshots to produce evolving timbres, and physical modeling synthesis, which solves differential equations approximating the acoustics of physical objects such as plucked strings or vibrating columns of air.

Britannica's article on music synthesizers traces the parallel development of analog and digital synthesis methods and their role in transforming studio and live performance practice.

MIDI and Digital Audio Workstations

The Musical Instrument Digital Interface (MIDI) standard, finalized in 1983 through a collaboration among Roland, Sequential Circuits, and other instrument manufacturers, defines a protocol for transmitting performance data (note pitch, velocity, control changes) between electronic instruments and computers. MIDI separates musical control from sound generation, allowing a single controller to drive multiple synthesizers and enabling the recording, editing, and playback of performances in a purely numeric form before any audio is rendered. The standard remains in active use; MIDI 2.0 was released in 2020 with higher resolution and bidirectional communication.

The MIDI Manufacturers Association's MIDI 2.0 specification extends the original standard with higher resolution, bidirectional communication, and improved property exchange.

Digital audio workstations (DAWs) such as Pro Tools, Ableton Live, and Logic Pro integrate MIDI sequencing with multitrack audio recording and software-based signal processing. They replaced dedicated hardware studios for most production tasks by the early 2000s, reducing the cost of professional-quality music production to the price of a computer and software.

Audio Signal Processing

Electronic music relies heavily on digital signal processing to transform recorded or synthesized audio. Key operations include equalization, dynamic range compression, reverberation simulation through convolution with impulse responses, and time-stretching without pitch change. Spectral analysis tools such as the fast Fourier transform (FFT) underlie both production effects and analysis systems used in music information retrieval research. The Audio Engineering Society (AES) publishes standards and peer-reviewed research covering these processing methods, along with loudspeaker design, spatial audio, and perceptual coding.

Applications

Electronic music technology has applications across a range of creative, industrial, and scientific domains, including:

• Film and video game soundtrack composition using software synthesis and sample libraries
• Live performance systems combining real-time synthesis with sensor-based instrument control
• Broadcast and streaming audio production and mastering
• Psychoacoustics research and hearing science using precisely controlled synthetic stimuli
• Accessibility tools that convert electronic music notation into performable audio for visually impaired musicians