Johann
Sebastian Bach (1685-1750)
The
Musical Offering, BWV 1079
On 7th July 1747 Bach's
son, Carl Philipp Emanuel, harpsichordist to King Frederick the Great,
presented to his employer, in his father's name, an engraved copy of The
Musical Offering. Bach had dedicated the work most submissively to His
Royal Majesty of Prussia, after having been prompted to compose it by his visit
to Potsdam. The 'royal theme',
which, on that occasion, 'would not work out properly' had now been 'worked out
with greater perfection' and Bach now wanted to make it known to the world
through this publication.
To the dedicatory copy
Bach also added the title: Regis Iussu Cantio Et Reliqua Canonica Arte Resoluta
(By command of the King, the theme and the rest worked out in canonic
style). The first letters spell the word Ricercare, and this acrostic
denotes the main feature of the work, the 'continual seeking out' of the royal
theme, in all conceivable forms of the art of variation.
The composer left little
in the way of instructions as to the order of the thirteen movements of the
work or their instrumentation. In accordance with Baroque structural
principles, the present recording presents the work in the following
symmetrical form:
I II III IV V
Ricercare Five Canons Trio
Sonata Five canons Ricercare
Thus two Ricercare form the outer frame.
The first, in three parts, is worked out as a strict fugue and the famous
second, as a crowning conclusion, in six parts.
The ten canons fall into
two groups. In the first the theme appears as a canto fermo, an
independent canon, in two parts in each case, developing in combination with
it. In the Canon perpetuus super Thema Regium, the canto fermo lies,
abridged, in the middle voice, entrusted to the violas, entwined in canon at
the double octave with oboe and bassoon; the canto fermo then appears in
its normal form in the lower voice in the next canon, and again changes in
shortened form to the upper part, given here to the flute, in the third canon,
accompanied by a canon in contrary motion. The next two are characterized by
remarks that Bach himself adds in explanation: Notulis crescentibus crescat
Fortuna Regis (As the note-values increase so may the fortune of the King)
is added to the Canon 4. a 2 per Augmentationem, contrario Motu
(Canon for two voices in augmentation and contrary motion). The theme is
ornamented and embedded in augmented form in a mirror canon. This is followed
by an even more complicated circle canon: Ascendente Modulatione ascendat
Gloria Regis (As the modulation moves upward, so may the King's glory).
In the second group of
canons the canonic melody develops from the royal theme itself. The number or
voices varies; the Canon a 4 is a particularly fine-sounding four-part
canon; in the Fuga canonica in Epidiapente (Canonic Fugue at the Upper
Fifth) a two-part canon appears, extended, as it were, into a three-part fugue.
After these displays of contrapuntal skill, there follows a puzzle canon, noted
in one part only. Qul Erendo invenietis (Seek and ye shall find), writes
Bach, over the Canon, contrarium stricte reversum (Canon in strict
retrograde), leaving the performer to find for himself the correct point of
entry for the second voice. Our recording proposes four distinct possibilities.
Of these the common interpretation, here with cor anglais and bassoon, comes
last; this is preceded by aversion with the strictly reversed canon in the
violas; in our first version, which is similar to the last, the first voice,
the cello, starts one octave lower, while the following voice, the harpsichord,
is played one octave higher, thus changing the soprano voice into a bass and
the 'strictly reversed' bass into a soprano. In the second version these two
voices exchange entries, the soprano, in the violas, one octave higher, begins
and the bass, one octave lower in the cellos, follows. After this comes a
two-part Canon cancrizans and, ending the group, the Canon perpetuus,
where the flute and violin playa canon in contrary motion with continuo
accompaniment.
The central place in The
Musical Offering is occupied by the Trio Sonata, for which Bach,
probably with the King in view, specified the instruments Flauto traverso. Violinoe
Basso continuo (Violoncello o Viola da gamba col Cembalo). In four movements,
Largo-Allegro-Andante-Allegro, the royal theme is presented in a variety
of guises.
English Version: Keith Anderson