We know for certain that vocal forces and organ followed a pattern of alternation which, in Bottazzi’s case, seems fully in line with the practices as evidenced by analogous works from the same period: five versets for the Kyrie, nine for the Gloria, two for the Sanctus and just one for the Agnus Dei, given that – according to Adriano Banchieri (1608) – the last of the three Agnus Dei would be replaced by an organ composition, generally a canzona. It is possible that a collection of canzonas, as well as a number of Magnificats and ricercars, might have formed the basis of a hypothetical second book of Choro et Organo, given that the title on the frontispiece incorporates the standard term of ‘Libro Primo’. Regrettably, we have no information, either on such a follow-up publication, nor indeed about Bottazzi’s own life, other than his self-description as coming from Ferrara (which may only have been a city he resided in or where he took his religious vows rather than where he was actually born). Before each of the organ versets, the beautiful edition of Choro et Organo always presents the melody in cantus firmus, written on a five-line stave. In his introductory text (‘To the gentle reader’), Bottazzi states that he ‘was resolved to have this part of the cantus firmus printed’ so as to circumvent the organist from playing the verset in question at such a pitch as to impede the choir from singing their own melodic part well (‘[…] if the cantus firmus is at one pitch, & the Organist plays it at another, it is impossible for the Chorister to find the correct note’). This unusual feature has allowed the cantus firmus part to be reconstructed with historical accuracy and for it to be sung according to the performance style that emerges from the vast instructional literature on cantus firmus that was produced in Italy during the 17th century.

Played on a rare historic organ: the organ at the church of S. Bernardino da Siena. Played and sung with total dedication and deep knowledge of the style by organist Federico Del Sordo and Nova Schola Gregoriana conducted by Alberto Turco, who already successfully recorded similar repertoire for Brilliant Classics: Organ Alternatim Masses by Merulo, Fasolo and Salvatore.