A ritornello (Italian; "little return") is a recurring passage in Baroque music for orchestra or chorus. The first or final movement of a solo concerto, concerto grosso, or aria may be in "ritornello form", in which the ritornello is the opening theme, always played by tutti, which returns in whole or in part and in different keys throughout the movement. In this, ritornello form differs from the rondo.

Ritornello form was favoured by Bach, Vivaldi, Telemann and Handel in chamber works, vocal pieces and, most prominently, in solo concerti and concerti grossi in a ‘tutti-solo-tutti-solo-tutti’ pattern. The ritornello, or the ‘tutti’ section, functions as a refrain or chorus while the solo sections may expand upon the short melodic lines of the tutti. At the end of the movement the entire ritornello returns in the home key. J.S. Bach's Brandenburg Concertos offer excellent examples. In opera seria, the ritornello functioned as the main structural support for the da capo aria, in which it was successively repeated.

Henry Purcell ( /ˈpɜrsəl/; 10 September 1659 (?)– 21 November 1695), was an English composer. Although incorporating Italian and French stylistic elements into his compositions, Purcell's legacy was a uniquely English form of Baroque music. He is generally considered to be one of the greatest English composers; no other native-born English composer approached his fame until Edward Elgar.

Purcell was born in St Ann's Lane Old Pye Street, Westminster. Henry Purcell Senior, whose older brother Thomas Purcell (d. 1682) was also a musician, was a gentleman of the Chapel Royal and sang at the coronation of King Charles II of England. Henry the elder had three sons: Edward, Henry and Daniel. Daniel Purcell (d. 1717), the youngest of the brothers, was also a prolific composer who wrote the music for much of the final act of The Indian Queen after Henry Purcell's death. Henry Purcell's family lived just a few hundred yards west of Westminster Abbey from the year 1659 and onward.

After his father's death in 1664, Purcell was placed under the guardianship of his uncle who showed him great affection and kindness. Thomas was himself a gentleman of His Majesty's chapel, and arranged for Henry to be admitted as a chorister. Henry studied first under Captain Henry Cooke (d. 1672),Master of the Children, and afterwards under Pelham Humfrey (d. 1674), Cooke's successor. Henry was a chorister in the Chapel Royal until his voice broke in 1673, when he became assistant to the organ-builder John Hingston, who held the post of keeper of wind instruments to the King.

Andreas Scholl (born 10 November 1967) is a German countertenor, a male classical singer in the alto vocal range. He is noted as a specialist in Baroque music.

Scholl was born on 10 November 1967 in Eltville, Germany, and grew up in neighboring Kiedrich. All of his family members were singers. He was enrolled at the age of seven into the Kiedricher Chorbuben (Kiedrich Choir-Boys) — which was first documented in 1333 as "a schola of men assisting the priests on all Sundays, singing the Gregorian chant." At age 13, Andreas Scholl sang the second boy (his sister Elisabeth sang the first boy) in Mozart's Die Zauberflöte at the Hessisches Staatstheater Wiesbaden. That same year, he was one of 20,000 choristers from all over the world gathered in Rome for a festival where Scholl was chosen to sing solo at Mass on 4 January 1981 and met Pope John Paul II. Along with his fellow choristers, Andreas Scholl was an extra in the film The Name of the Rose, playing a young monk standing alongside Sean Connery in scenes shot at Eberbach Abbey, near Kiedrich.

Philippe Jaroussky (born 13 February 1978 in Maisons-Laffitte, France) is a French sopranist countertenor. He began his musical career with the violin, winning an award at the Versailles conservatory and then took up the piano before turning to singing. He is noted for a virtuosic coloratura technique and for compelling and enlivened interpretations of baroque cantatas and operas.

Jaroussky was inspired to sing by the Martinique-born countertenor Fabrice di Falco. He received his diploma from the Early Music Faculty of the Conservatoire de Paris. Since 1996, he has studied singing with Nicole Fallien. He has formed his own ensemble called Artaserse, and also often performs with the Ensemble Matheus under Jean-Christophe Spinosi and with L'Arpeggiata under Christina Pluhar.

According to La Terrasse, "this young singer with the tone of an angel and the virtuosity of the devil has come into the limelight in only a few years as the great new French vocal talent."^{[citation needed]} He received the 2007 best French lyrical artist award. Jaroussky was awarded "The Best Singer of the Year" at the Echo Classic Awards, 2008.

Sir John Eliot Gardiner CBE FKC (born 20 April 1943, Fontmell Magna, Dorset, England) is an English conductor. He founded the Monteverdi Choir (1964), the English Baroque Soloists (1975) and the Orchestre Révolutionnaire et Romantique (1989). Gardiner has recorded over 250 albums with these and other musical ensembles, most of which have been published by Deutsche Grammophon and Philips Classics. Gardiner is most famous for his interpretations of Baroque music on period instruments with the Monteverdi Choir and the English Baroque Soloists, but his repertoire and discography are not limited to early music. With the Orchestre Révolutionnaire et Romantique Gardiner has performed a wide range of Classical and Romantic music, including many works of Hector Berlioz and all of Beethoven's symphonies. A recording of the third symphony of the latter was used in a dramatisation by the BBC of Beethoven's writing of that symphony. Gardiner has served as chief conductor of the North German Radio Symphony Orchestra and has appeared as guest conductor with such major orchestras as the Berlin Philharmonic, Boston Symphony Orchestra, Chicago Symphony Orchestra, Cleveland Orchestra, London Symphony Orchestra, Philharmonia, Royal Concertgebouw Orchestra, and Vienna Philharmonic.