The air de cour was a popular type of secular vocal music in France in the late Renaissance and early Baroque period, from about 1570 until around 1650. From approximately 1610 to 1635, during the reign of Louis XIII, this was the predominant form of secular vocal composition in France, especially in the royal court. Features The first use of the term air de cour was in Adrian Le Roy's Airs de cour miz sur le luth (Book on Court Tunes for the Luth), a collection of music published in 1571. The earliest examples of the form are for solo voice accompanied by lute; towards the end of the 16th century, four or five voices are common, sometimes accompanied (or instrumental accompaniment may have been optional); and by the mid-17th century, most airs de cour were again for solo voice with accompaniment. Beginning in 1608, airs de cour were often taken from ballets de cour, a form of ballet which was quickly becoming popular at the French court. Musically they were strophic, i.e. successive verses of the text were set with similar music. While the earlier music, especially that for multiple voices, was polyphonic, after about 1610 the music usually was homophonic, sung syllabically and without meter, with a clear influence from the musique mesurée which developed in Paris around 1570. Collections exist which deviate considerably from these trends, however; several printers specialized in polyphonic airs de cour throughout the early 17th century, and there are eight volumes published by Le Roy & Ballard which are monophonic – for a single voice with no accompaniment. Airs de cour show surprisingly little influence from the Italian early Baroque trends of monody and the madrigal, either in its polyphonic or its concertato form. This is all the more surprising as Italian musicians often worked in France, and the polyphonic and concertato forms of madrigal were being deeply influential in Germany at the same time. Emotional expression in the airs de cour, compared to that of the contemporary Italian madrigalists, is cool, classical and reserved, in keeping with contemporary French taste. Vocal range of the music is usually limited to one octave; dissonance and chromaticism are rare; and the overall simplicity of expression is striking. The influence of the air de cour extended beyond France. Collections were published in Germany, and more importantly in England, where translations were rather popular, as attested by