An opera is a large scale dramatic work in which music, singing and theatrical action are integrated to tell a story or present a dramatic situation. Opera typically combines solo singing, ensemble singing, chorus, orchestra, acting, staging, scenery, costumes, lighting and movement, although individual productions and historical periods use these elements differently. The word derives from the Italian opera, meaning work or works, and is related to the idea of a work combining multiple artistic components. Opera developed in Italy around the turn of the seventeenth century and subsequently became one of the major traditions of Western art music. Its defining characteristic is not simply that people sing, but that musical performance functions as an integral component of theatrical drama.
Early opera developed from several late Renaissance interests, including attempts to understand and recreate aspects of ancient Greek drama, experiments with dramatic madrigals, court entertainments and new approaches to expressive solo singing. The earliest surviving operas appeared in Italy around 1600. Jacopo Peri's Euridice and Claudio Monteverdi's L'Orfeo are particularly important landmarks. Monteverdi demonstrated how recitative, aria like passages, instrumental music, choruses and dramatic pacing could be combined into a coherent theatrical work. Opera quickly spread beyond Italy, developing distinct traditions in France, England, German speaking territories and elsewhere. As it spread, composers and audiences established different preferences concerning language, vocal style, subject matter, staging and musical structure.
Opera contains several recurring musical components, although no single combination applies to every work. Recitative historically allowed singers to deliver dialogue and narrative information using speech related rhythms and relatively flexible melodic structures. Arias generally provided more extended melodic expression and opportunities for characterisation and vocal virtuosity. Ensembles allowed several characters to sing simultaneously, often creating complex dramatic situations in which different perspectives coexist. Choruses could represent groups of people, provide commentary or create large musical climaxes. Orchestral passages could establish setting, accompany singers, portray characters, introduce themes or function independently. Later composers increasingly integrated these components into continuous musical structures rather than separating them into clearly labelled numbers.
Opera developed numerous national and stylistic traditions. Italian opera produced genres including opera seria, comic opera and later verismo, while French traditions developed forms such as tragédie lyrique and grand opera. German language opera developed through composers including Mozart, Beethoven, Weber and Wagner, with Wagner eventually pursuing a highly integrated concept in which music, poetry, drama and staging functioned as a unified whole. English opera developed differently, including traditions associated with Henry Purcell and later composers. Russian, Czech and other European traditions incorporated national languages and cultural subjects. These developments show that opera is not one homogeneous style but an international family of theatrical musical practices.
Opera is closely connected with the human voice because composers write music that must communicate both musical structure and dramatic text. Different voice types have traditionally been associated with different character categories, although modern practice is more flexible. Sopranos and mezzo sopranos commonly perform high female roles, tenors and baritones commonly perform male roles in corresponding ranges, and basses frequently perform lower characters. Fach, meaning a vocal category or classification, considers not only range but also vocal weight, colour, tessitura and dramatic requirements. Operatic singing also requires specialised breath control, projection and diction because singers must often be heard over an orchestra without electronic amplification in traditional performance conditions.
Opera houses and productions add another dimension to the genre because an opera exists simultaneously as a musical score and as a theatrical performance. Directors interpret characters, settings, movement, relationships and dramatic timing. Designers determine scenery, costumes, lighting and visual atmosphere. Conductors coordinate orchestra and singers, while stage management coordinates complex theatrical activity. A production can therefore differ considerably from another production of the same opera while retaining the same musical score. Modern opera can also incorporate projection, electronic technology, contemporary staging and revised visual concepts. These practices demonstrate that opera is inherently collaborative and cannot be fully understood by considering the written musical notes alone.
Opera has influenced and been influenced by wider cultural, political and technological changes. Court opera in earlier periods depended heavily on aristocratic patronage, while public opera houses expanded access to paying audiences. The nineteenth century saw enormous growth in opera's cultural importance and the development of major national traditions. Twentieth and twenty first century composers have continued to experiment with atonality, electronic sound, minimalist techniques, contemporary subjects and unconventional theatrical structures. Recording technology has also transformed opera by allowing performances to circulate beyond the theatre. Nevertheless, live performance remains important because acoustic interaction among singers, orchestra, stage and audience is a fundamental part of the traditional operatic experience.
Opera is therefore best understood as music drama in which vocal and instrumental music are integrated with theatrical presentation. It differs from an oratorio because opera normally uses staging and enacted drama, from a cantata because a cantata does not normally depend upon theatrical action, and from a musical because opera historically places a much greater proportion of the dramatic structure within composed music, although modern boundaries can overlap. There are also hybrid forms and works that deliberately challenge conventional definitions. The history of opera demonstrates a continuing interaction among poetry, music, acting, visual art, technology, patronage and public culture, making it one of the most comprehensive performance traditions in Western music.
