The Amsterdam Baroque Orchestra is not a full-time ensemble, but nevertheless a quite busy group of about 26 or so musicians, many of international renown, who assemble several times yearly to perform a series of concerts devoted mostly to Baroque-era music. The repertory range falls in the period 1600 to 1791 (the year of Mozart's death, not a coincidental cutoff point, according to the group's founder, conductor Ton Koopman). The ABO regularly appears on recordings, its discography actually outpacing its concert work in later years. Perhaps the recording project the ABO is b...