Catalyst Quartet presents the fourth and final release of a multi-volume anthology highlighting string quartet works by historically important Black composers. Volume 4 profiles French composer Joseph Bologne Chevalier de Saint-Georges and features three distinct sets of six quartets, each composed at different times in Bologne’s musical career. This marks the first-ever commercial recording of all 18 works together. The digital-only album opens with Bologne’s concertante quartets, published in 1779. They have no opus number but bear the subtitle “aux gôut du jour” (in the style of the time), and are representative of early Parisian renditions of the 18th-century string quartet style most associated with Haydn. The Op. 1 quartets were likely among the composer’s first output, written at the beginning of the 1770s and published in 1773. Like all of Bologne’s string quartets, they are written in two movements and offer a window into the sound world of Parisian chamber music circles of the late eighteenth century. The Op. 14 quartets were Bologne’s last works of instrumental music, and a unique departure from his focus on vocal music at the time. Published in 1785, the set is perhaps more mature and confident than Bologne’s entries from the 1770s.