Born in Bologna, Giovanni Battista Vitali (1632-1692) spent all his life between his birth city and Modena, where he moved in 1674. There is something noteworthy in this geography of the composer: Vitali's move from Bologna, then part of the Papal States under the administration of Rome, to the smaller but significantly more secular and artistically stimulating Modena, under the rule of the splendid Este family, is suggestive of a desire to achieve greater expressive freedom. Artificii Musicali (Modena, 1689) has given Vitali a respectable place in music history, particularly if one considers the oft supposed idea that it served as inspiration for J.S. Bach's Musical Offering, J. Fux's Gradus ad Parnassum (1725) and G.B. Martini's Saggio Fondamentale Pratico di Contrappunto sopra il Canto Fermo (1774). Vitali's Artificii Musicali appeared at a historical crossroad, during the final decades of the 17th century, when there was an explosive rise in instrumental music. There are 40 canons in this work and interspersed among them there are 4 that can be classified as riddle-canons or enigma-canons. These intriguing pieces are accompanied by a brief Latin motto containing the key for their realization, which is left to the reader to decipher (of note, Bach also included two riddle-canons with Latin mottos in the Musical Offering). The final 9 pieces in the Artificii are an eclectic collection of balletti, capricci, a passagallo, and 2 violin sonatas, representative of the main forms of instrumental music at the end of the 17th century. Although Artificii was originally written for violin and bass, Andrea Coen performs here on a harpsichord, and furthermore a harpsichord in equal temperament.