At the outset we hear the Aria; the G
major Sarabande 3/4 from ‘Anna Magdalena’s Notebook’. This
has an elaborate treble line, already a variation above the bass. Tovey
observed of the Aria: ‘Its phrasing is as uniform as a chess-board; and
if its harmonies had not a one-to-one correspondence with each
variation, the form would be lost.’
Variation 1 3/4 is a duet
with a quaver figure in the left hand, a semiquaver in the right, and
the two interchanged. Rosalyn Tureck sees it as ‘an archway’ to the
subsequent unfolding of Bach’s vast, expressive structure. With
Variation 2 2/4 Bach introduces a delicate three-part cantabile; the
upper parts pursuing a imitative dialogue, at variance with the bass
line.
Variation 3 becomes the first of Bach’s canons; his canon
on the unison 12/8. A trio with even-handed upper parts; these voices
cross paths and through the bass its harmony is kept in motion. A
constant overlapping of entries characterizes the ensuing four-part 3/8
fugal discourse with a sole three-note figure and its inversion.
The
next, extrovert 3/4 duet called for two keyboards ‘a 1 Clav’ and ‘a 2
Clav’ as Bach originally dictated (Balthasar and Schmid) in his
reference to the seperate manuals. A bouyant variation with frequent
crossing of hands.
Variation 6. At the Canon on the second 3/8 we
are on serene territory while upper discords resolve naturally to a
third against a striding bass.
There follows a thematic duet 6/8;
Bach’s sole variation in the manner of a binary gigue; commonly an
animated fourth movement of the classical French-style suite.
Variation
8—yet another duet 3/4, originally assigned to the second manual. The
first pair of statements are eventually inverted.
Bach’s ‘Canon
in the third’ 4/4 is an essay in consonance with the bass more
unconstrained, yet still making regular reference to the original
harmony.
Variation 10 is a four-part fughetta 2/2. The four-part bass theme reminds us plainly of Bach’s harmonic starting point.
More outwardly virtuosic duet writing 2/2 characterizes Variation 11.
With
the Canon in the fourth 3/4 entries are re-ordered and themes
capriciously inverted in the latter half. Here the inversion is as clear
and expressive as its original form. Bach must have smiled inwardly at
his tacit, jestful approach to the prevailing formal structure.
In
his embellished aria for Variation 13 Bach proceeds 3/4 with a rich,
lyrical upper statement and the lower accompanying voices doubled; its
style is ornamental throughout.
The 14th Variation is an outgoing duet calling for dazzling fingerwork 3/4. Each of four statements is eventually inverted.
With
the Canon in the fifth and inversion 2/4 the work has deepened and a
more elegiac note appears. This more sober, strongly emotional,
chromatic writing finishes not on the conventional tonic, as one might
expect, but on the fifth; ascending as one commentator remarks ‘into
silence’.
Variation 16 is a bold, massive, French-style overture
2/2, still in binary form and generally regarded as Bach’s preparatory
nod toward part two of the Aria and Variations. In strict form, as
introduced by Lully (1685), the variation opens with dotted rhythms and
ends with an accelerated fugue, in this instance the 3-part fughetta 2.
A straightforward yet highly complex duet 3/4 forms Variation 17.
It
is followed by Bach’s Canon in the sixth 2/2. As the canonic parts move
in sixths with the pause of a minim, accents of the upper parts are
reversed. Resulting suspended discords give variation 18 a distinctive
harmonic ‘thumbprint’. The polyphony is further ‘clarified’ and the
Variation’s original bass also evident within the canonic lines.
In the trio 3/8 of Variation 19 brief figures (quaver and semiquaver) are periodically interchanged as the Variation progresses.
Bach’s
duets become increasingly virtuosic as Variation 20 demonstrates. This
one 3/4 has fast semiquaver triplets in two of its three sets of
figures.
Canon in the seventh. A gentle, contemplative mood 4/4 is established as the closely-spaced parts succeed one another.
Variation
No 22 is a four-part fugue 2/2; its guileless motif builds up with
inexorable, structural splendour to full, ringing chords.
An
exuberant, comic duet 3/4 with dashing double third and double sixth
figures; Variation 23 includes tongue-in-cheek mordents and sobriety is
cast to the winds.
Canon in the octave 9/8. This rural theme and
answer proceeds with an aura of timelessness, while the melody moves to
adjacent notes.
Variation 25: this highly charged G minor
Variation 3/4 is a powerful, profoundly tragic utterance. A further
embellished aria: the brilliant, chromatic bass structure and the
unusually specific treble melody interact with unsettling intensity,
almost threatening tonal stability.
Bach combines both duet and
trio 3/4 in his 26th Variation. A two-part Sarabande is woven around
with coursing triplet figurations.
Here, with the final Canon in the ninth 6/8 the bass is silent; the mood relaxed.
Both
No 28 3/4 and the following Variation anticipate the work’s conclusion.
Here the part-writing is supplanted in part by complex two-part
embellishments. Karl Geiringer notes that this Variation and No 29
appear to anticipate a nineteenth-century style of keyboard writing.
With the penultimate Variation excitement is further heightened in chord sequences and fleet-fingered one-part passages.
Variation
30. At this point we might reasonably expect to discover a canon at the
10th. Instead Bach confounds and delights with his Quodlibet, a
divertissement on popular tunes, rounding off the work in a genuine mood
of humour and congeniality. It recalls the social fun enjoyed by the
Bach family and their friends. The principal quodlibet tunes are German
folksongs: ‘I have not been with you for so long’ and ‘Cabbage (Kraut)
and turnips (Ruben) have driven me away’. The German saying
‘Durcheinander wie Kraut und Rüben’ can also mean ‘in complete
confusion’ and some commentators believe this more idiomatic translation
is clear evidence of Bach’s own (intentional) hearty laughter when
recollecting the complexity of all that precedes his quodlibet.
Beneath
the fugal treatment of these folk tunes Bach returns to his original
bass. In doing so he leads listeners back to that generating Aria, the
life source from whence these encompassing
Variations stemmed and to
which they now return. Finally, via immeasurable complexities, their
wellspring is enhanced and re-invested with a profound, affirmative
sense of renewal. For many listeners these closing sequences are the
work’s most surpassing.
from notes by Howard Smith © 1992