Sunday July 13 & Sunday July 20 2014 The methods of determining the origins of the various movements that Bach compiled to assemble the Mass in B Minor are several, but the most interesting, and problematic, is that of calligraphic analysis. Within the autograph score, three types of Bach’s handwriting have been identified: the so-called “fair” hand, characterized by meticulously spaced notes, vertically upright note stems, and calligraphic text; the “revision” hand, characterized by the fluent copying of notes for one group of instruments or voices, but poorly spaced and often corrected notes in another part, and often cluttered verbal underlay (the result of applying a new text to preexisting musical material); and the “composing” hand, characterized by diagonal note stems, uneven note spacing, corrections, and generally poor calligraphy. Through the identification of these handwriting styles, much can be determined regarding the originality of the musical material; that is, whether or not a piece was pre-existing, a parody of an earlier work, or newly composed.
Such technical detective work does not, however, shed light on the most burning question of all: Why did Bach compile, or assemble, a work for which he had no plans or need for performance? We know that in Bach’s last years, he set his hand to two other summative documents that would become monuments of his compositional legacy. In 1747, The Musical Offering was composed and very shortly thereafter published, and The Art of the Fugue, a collection of fugues and canons that exhaustively catalogues the contrapuntal possibilities of one predominant fugue subject, was copied out by Bach in 1745 and published in its final, yet incomplete, form in 1751 (one year after his death). Bach was clearly reading the writing on the wall regarding his “old school” craftsmanship. Compositional styles had already changed quite dramatically, and the fact that Bach’s music was more or less always considered to be old-fashioned further exacerbated his fears that a century of contrapuntal mastery—begun by his predecessors—was simply going down the drain. He had no reason to believe that any of his church cantatas would survive. Indeed, Bach’s own compositions essentially replaced those of the previous Leipzig Kantor, and newly composed works by whomever would be his successor would surely replace his. But complete settings of the choral movements from the Ordinary of the Mass had survived as time capsules from previous centuries. And new Age of Enlightenment trends would further secure the longevity of such “masterworks” (a concept that was still mostly outside of the consciousness of artists and their patrons). By encapsulating works from a span of at least thirty-five years—the “Crucifixus” is borrowed from music composed in 1714, and the new movements including “Confiteor” were composed in 1749—Bach was able to leave behind a lasting testament to his art.
Several movements contain more than one type of handwriting. For example, the opening Kyrie contains all three. The initial four bars show the revision hand for the instrumental parts, which were put to paper first, and the composing hand for the vocal parts. Then, the main body of the Kyrie is in the fair hand, indicating a pre-existing work. Generally, those movements in the fair or revision hands are considered to be pre-existing or parodies. But Bach’s health was poor by the time he compiled the complete mass (or, missa tota), and there are arguments as to whether or not his infirmity led him to preliminarily sketch new music before committing it to the final version of the score, thus clouding the issue in the cases of music not in the composing hand and that cannot be found among his earlier surviving works.
— Jeffrey Thomas & Kristi Brown-Montesano
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