Grisey, Gérard

Spectralism is a movement in contemporary classical music that treats timbre and the acoustic spectrum as primary compositional materials. Rather than building music from abstract pitch-class sets or functional harmony, spectral composers derive harmonies, orchestrations, and formal processes from the real-world spectra of sounds. Using tools such as Fourier analysis, they decompose a sound into its partials and then re-synthesize or orchestrate those partials across instruments, often employing microtonality, extended techniques, and slow, morphing processes. The result is music where color, resonance, and perceptual phenomena shape structure as much as melody or rhythm.

Contemporary classical is the broad field of Western art music created after World War II. It embraces an array of aesthetics—from serialism and indeterminacy to minimalism, spectralism, electroacoustic practices, and post‑tonal lyricism—while retaining a concern for notated composition and timbral innovation. Unlike the unified styles of earlier eras, contemporary classical is pluralistic. Composers freely mix acoustic and electronic sound, expand instrumental techniques, adopt non‑Western tuning and rhythm, and explore new forms, from process-based structures to open and graphic scores. The result is a music that can be rigorously complex or radically simple, technologically experimental or intimately acoustic, yet consistently focused on extending how musical time, timbre, and form can be shaped.

Electroacoustic music is a broad art-music tradition that integrates recorded acoustic sound and electronically generated or processed sound into coherent musical works. It privileges timbre, gesture, texture, and spatialization over conventional melody-and-harmony song forms, often employing tape manipulation, synthesis, live electronics, and computer-based signal processing. Works are frequently composed for fixed media (stereo or multichannel loudspeakers) and may also involve live performers who are transformed in real time. Concert presentation typically emphasizes spatial diffusion and immersive listening, and the repertoire spans concert works, radio pieces, installations, and soundscape compositions.

Classical music is the notated art-music tradition of Europe and its global descendants, characterized by durable forms, carefully codified harmony and counterpoint, and a literate score-based practice. The term “classical” can refer broadly to the entire Western art-music lineage from the Medieval era to today, not just the Classical period (c. 1750s–1820s). It privileges long-form structures (such as symphonies, sonatas, concertos, masses, and operas), functional or modal harmony, thematic development, and timbral nuance across ensembles ranging from solo instruments to full orchestras and choirs. Across centuries, the style evolved from chant and modal polyphony to tonal harmony, and later to post-tonal idioms, while maintaining a shared emphasis on written notation, performance practice, and craft.