<P> The Baroque period is divided into three major phases: early, middle, and late . Although they overlap in time, they are conventionally dated from 1580 to 1630, from 1630 to 1680, and from 1680 to 1730 . </P> <P> The Florentine Camerata was a group of humanists, musicians, poets and intellectuals in late Renaissance Florence who gathered under the patronage of Count Giovanni de' Bardi to discuss and guide trends in the arts, especially music and drama . In reference to music, they based their ideals on a perception of Classical (especially ancient Greek) musical drama that valued discourse and oration . As such, they rejected their contemporaries' use of polyphony (multiple, independent melodic lines) and instrumental music, and discussed such ancient Greek music devices as monody, which consisted of a solo singing accompanied by a kithara (an ancient strummed string instrument). The early realizations of these ideas, including Jacopo Peri's Dafne and L'Euridice, marked the beginning of opera, which were a catalyst for Baroque music . </P> <P> Concerning music theory, the more widespread use of figured bass (also known as thorough bass) represents the developing importance of harmony as the linear underpinnings of polyphony . Harmony is the end result of counterpoint, and figured bass is a visual representation of those harmonies commonly employed in musical performance . With figured bass, numbers, accidentals or symbols were placed above the bassline that was read by keyboard instrument players such as harpsichord players or pipe organists (or lutenists). The numbers, accidentals or symbols indicated to the keyboard player what intervals she should play above each bass note . The keyboard player would improvise a chord voicing for each bass note . Composers began concerning themselves with harmonic progressions, and also employed the tritone, perceived as an unstable interval, to create dissonance (it was used in the dominant seventh chord and the diminished chord . An interest in harmony had also existed among certain composers in the Renaissance, notably Carlo Gesualdo; However, the use of harmony directed towards tonality (a focus on a musical key that becomes the "home note" of a piece), rather than modality, marks the shift from the Renaissance into the Baroque period . This led to the idea that certain sequences of chords, rather than just notes, could provide a sense of closure at the end of a piece--one of the fundamental ideas that became known as tonality . </P> <P> By incorporating these new aspects of composition, Claudio Monteverdi furthered the transition from the Renaissance style of music to that of the Baroque period . He developed two individual styles of composition--the heritage of Renaissance polyphony (prima pratica) and the new basso continuo technique of the Baroque (seconda pratica). With basso continuo, a small group of musicians would play the bassline and the chords which formed the accompaniment for a melody . The basso continuo group would typically use one or more keyboard players and a lute player who would play the bassline and improvise the chords and several bass instruments (e.g., bass viol, cello, double bass) which would play the bassline . With the writing of the operas L'Orfeo and L'incoronazione di Poppea among others, Monteverdi brought considerable attention to this new genre . </P>

What is the importance of the tonal system that developed during the baroque era
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