Origins of opera
"Dafne" by Jacopo Peri was the earliest composition considered opera, as understood today, although with only five instrumental parts it was much more like a chamber opera than either the preceding intermedi or the operas of Claudio Monteverdi a few years later. It was written around 1597, largely under the inspiration of an elite circle of literate Florentine humanists who gathered as the "Camerata". Significantly, "Dafne" was an attempt to revive the classical Greek drama, part of the wider revival of antiquity characteristic of the Renaissance. The members of the Camerata considered that the "chorus" parts of Greek dramas were originally sung, and possibly even the entire text of all roles; opera was thus conceived as a way of "restoring" this situation. The libretto was by Ottavio Rinuccini, who had written some of the 1587 Medici intermedi, in which Peri had also been involved; Rinuccini appears to have recycled some of the material, at least from the scene illustrated at right. Most of the music for "Dafne" is lost (the libretto was printed and survives), but one of Peri's many later operas, "Euridice", dating from 1600, is the first opera score to have survived to the present day.
Origins of opera
Peri's works, however, did not arise out of a creative vacuum in the area of sung drama. An underlying prerequisite for the creation of opera proper was the practice of monody. Monody is the solo singing/setting of a dramatically conceived melody, designed to express the emotional content of the text it carries, which is accompanied by a relatively simple sequence of chords rather than other polyphonic parts. Italian composers began composing in this style late in the 16th century, and it grew in part from the long-standing practise of performing polyphonic madrigals with one singer accompanied by an instrumental rendition of the other parts, as well as the rising popularity of more popular, more homophonic vocal genres such as the frottola and the villanella. In these latter two genres, the increasing tendency was toward a more homophonic texture, with the top part featuring an elaborate, active melody, and the lower ones (usually these were three-part compositions, as opposed to the four-or-more-part madrigal) a less active supporting structure. From this, it was only a small step to fully-fledged monody. All such works tended to set humanist poetry of a type that attempted to imitate Petrarch and his Trecento followers, another element of the period's tendency toward a desire for restoration of principles it associated with a mixed-up notion of antiquity.
The solo madrigal, frottola, villanella and their kin featured prominently in the intermedio or intermezzo, theatrical spectacles with music that were funded in the last seventy years of the 16th century by the opulent and increasingly secular courts of Italy's city-states. Such spectacles, were usually staged to commemorate significant state events: weddings, military victories, and the like, and alternated in performance with the acts of plays. Like the later opera, an intermedi featured the aforementioned solo singing, but also madrigals performed in their typical multi-voice texture, and dancing accompanied by the present instrumentalists. They were lavishly staged, and led the scenography of the second half of the 16th century. The intermedi tended not to tell a story as such, although they occasionally did, but nearly always focused on some particular element of human emotion or experience, expressed through mythological allegory.