Alfred Schnittke

A concerto grosso is a Baroque-era orchestral form built on contrasts between a small group of soloists (the concertino) and the full ensemble (the ripieno or tutti). It typically features strings with basso continuo, terraced dynamics, antiphonal dialogue, and clear tonal harmony. Two principal subtypes emerged: the church-oriented sonata da chiesa (often in a four-movement slow–fast–slow–fast plan) and the dance-inflected sonata da camera (suite-like movements). The genre highlights thematic exchange, sequences, and imitation, with the concertino—often two violins and cello—embroidered against broader tutti refrains. Corelli’s models codified its syntax, and Handel’s sets represent its late-Baroque culmination.

The choral concerto is a genre of Eastern Orthodox sacred music that emerged in the mid‑seventeenth century in the Russian Empire, particularly through the work of Ukrainian composers and chapel traditions. Written for unaccompanied choir (a cappella), these works are typically multi‑sectional and contrast homophonic, declamatory blocks with brief soloistic or small‑ensemble passages. Texts are drawn from Psalms and other scriptural or festal sources in Church Slavonic. In liturgical practice, choral concertos were sung during the Divine Liturgy at the moment when the clergy took Holy Communion—just before the Communion of the faithful—so they balance contemplative devotion with vivid rhetorical projection. Stylistically, the genre fuses native chant and Orthodox polyphony with Baroque concepts of contrast and sectional articulation. Although concise, many pieces employ double‑choir writing, antiphonal effects, and expressive dynamic “terracing,” all while maintaining the Orthodox prohibition against instruments inside the church.

Chamber music is a tradition of composed music for small ensembles—typically one player per part—intended for intimate spaces such as courts, salons, and private rooms rather than large public halls. Its aesthetic emphasizes clarity of texture, conversational interplay among parts, and balance without a conductor. Hallmark formations include the string quartet, piano trio, wind quintet, string quintet, and various mixed ensembles. Multi‑movement cycles (often in sonata form) and finely wrought counterpoint are common, ranging from Baroque trio sonatas to Classical string quartets and modern works with expanded timbres and techniques. Because of its scale and transparency, chamber music has long been a proving ground for compositional craft and ensemble musicianship, shaping the core of Western art music from the Baroque through the present.

A requiem is a musical setting of the Roman Catholic Mass for the Dead (Missa pro defunctis). Historically rooted in Latin liturgy, it sets movements such as the Introit, Kyrie, (historically) the Sequence Dies irae, Offertory, Sanctus, Agnus Dei, and Communion, and often includes additional responsories like Libera me and In paradisum. While the earliest requiems were monophonic chants, the genre became a showcase for polyphonic and later symphonic choral writing. Renaissance composers wrote austere, modal settings; Classical and Romantic composers expanded the forces and dramatic scope; and 20th–21st century composers reimagined the form with new languages, from neo-modal and impressionistic harmonies to avant‑garde sonorities. Today, requiems appear both in liturgy and as concert works, symbolizing collective mourning, remembrance, and spiritual reflection.

Mass is a large-scale vocal genre that sets the Ordinary of the Roman Catholic liturgy—Kyrie, Gloria, Credo, Sanctus (and Benedictus), and Agnus Dei—most often in Latin. It began as monophonic chant but developed into sophisticated polyphony and later into concert works for choir, soloists, and instruments or full orchestra. Across history, composers have used techniques such as cantus firmus, imitation, paraphrase, and parody to unify movements. The genre spans from austere a cappella writing to monumental symphonic-choral statements, and today is performed both liturgically and in the concert hall. Common subtypes include Missa brevis (short Mass, often omitting the Credo or compact in scale) and Missa solemnis (festal, expansive forces and duration).

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.

Russian music refers to the broad body of folk, sacred, art, and popular music that developed in the lands of historical Rus' and the Russian state. It combines deep-rooted Slavic folk traditions, Orthodox liturgical chant, and European art-music practices absorbed and reimagined from the 18th century onward. Hallmarks include modal folk melodies, powerful choral sonorities (often with resonant basso profundo lines), bell-like tone colors, and an affinity for expansive, emotionally charged lyricism. Folk dances and songs—carried by instruments like balalaika, domra, gusli, and the bayan—coexist with a towering classical canon (from Glinka and Tchaikovsky to Shostakovich) and a rich 20th-century popular sphere (bard song, estrada, rock, and hip hop).

Russian Orthodox liturgical music is the a cappella chant and choral tradition of the Russian Orthodox Church, sung in Church Slavonic during services such as the Divine Liturgy, the All‑Night Vigil, and the Hours. It grew from medieval monophonic chant (especially Znamenny, but also Demestvenny and Put’) structured by the octoechos (eight-mode) system inherited from Byzantium. From the 17th century onward, polyphonic and later richly harmonized choral idioms developed alongside chant, creating a uniquely Slavic blend of ancient modal melody and Romantic choral sonority. Hallmarks include unaccompanied mixed or male choirs, free, text-driven rhythm, deep basses (oktavists), luminous chordal writing in later repertoire, and a reverent, prayerful tone that prioritizes clarity of the sacred text over display. Instruments are not used, in keeping with Orthodox canons.

“European music” is a broad umbrella covering the historical and regional practices that developed across the European continent, from medieval sacred chant and courtly song to folk traditions, art (classical) music, and later popular and electronic styles. Common threads include the codification of staff notation, the development of modal and later tonal harmony, the use of structured forms (e.g., mass, motet, madrigal; sonata, symphony, opera; verse–chorus song), and a rich palette of instruments culminating in the modern orchestra and various regional folk ensembles. While extremely diverse from region to region, European music is marked by a continuous dialogue between sacred and secular practices, learned written traditions and oral folk idioms, and later between art music and mass-market popular genres.

Western classical is the notated art-music tradition that developed in Europe from medieval Christian chant into the large-scale secular and sacred forms of the Baroque, Classical, Romantic, and modern eras. It is characterized by staff notation, evolving systems of modality and tonality, and forms such as symphony, sonata, concerto, mass, opera, and chamber music. Across its history, Western classical established an extensive theory of harmony and counterpoint, refined orchestration across strings, winds, brass, and percussion, and cultivated performance practices from a cappella chant to full symphonic and operatic forces. Its repertoire, pedagogy, and institutions (conservatories, orchestras, opera houses) made it a global reference point for compositional craft and instrumental technique.

Choral refers to music written for and performed by a choir—an ensemble of voices organized into sections such as soprano, alto, tenor, and bass (SATB), or same-voice groupings (SSA, TTBB). It encompasses both sacred and secular repertoire and may be sung a cappella or with accompaniment by organ, piano, or full orchestra. Stylistically, choral music ranges from chant-like monophony to intricate polyphony and rich homophonic textures. Texts are drawn from liturgy, scripture, poetry, and vernacular sources, and are set in many languages. Performance contexts include church services, concert halls, and community events, making choral one of the most socially embedded and widely practiced forms of ensemble music. Across history, choral music has served as a laboratory for vocal counterpoint, word painting, and text-driven form, while functioning as a cultural bridge among religious rites, national traditions, and contemporary concert practice.