Let’ s continue the work begun in the fifth article and let’s analyse some other Two-Part Invention by J.S. Bach.
The Invention No.4 in D minor BWV 775 is probably a fluid musical piece. We deduce it from the indication 3/8 which is often associated with brilliant performances, from a substantially uniform writing in which prevail conjunct motions and from the absence of particularly expressive intervals that could indicate moments of lyricism. There are some similarities with the Passepied (for example the one of the English Suite No. 5 in E minor) and we can deduce a pulsation for every bar.
As recommended in the fourth article, we can begin our analysis by identifying the moments of Thesis and the moments of Arsi in the first measures; then we’ll follow the same rules for the whole piece.
The practice could lead us to identify the first beat as the bearer of the tonic accent, but a closer analysis of the writing makes us think that the piece begins on hand up and has his strong beat on the “even” measures. We note in fact that the flow of sixteenth notes which move in conjunct motion is interrupted only by two intervals of diminished seventh that precede and follow the C-sharp of the second measure, clearly highlighting it and suggesting a proper emphasis at that point.
Invention No. 4 – Measures 1-2
It is evident the change of accentuation with the “Emiolia” in the cadence of the measures 16 and 17.
Invention No. 4 – Measures 16-17 – Emiolia
On a practical level, we can conduct the sixteenth notes of the first measure with an almost tied or slightly articulated touch (if we pronounce too much the individual sixteenths we risk to multiply the impulses and to weigh the trend). Then we can clearly separate the B-flat from the C-sharp, stay on the C-sharp a little longer than the narrow value of the sixteenth and then, after having separated the C-sharp from the next B-flat, resume the light “legato” by “slipping” towards the third bar and by recovering, with a small increase of speed, the “lost” time in the two articulations and in the brief stop on the C-sharp.
Invention No.4 – Measures 1-2-3-4
It is worth dwelling, before moving on to another Invention, on the two long ornaments of the measures 19-20-21 (on the right) and 29-30-31-32-33 (on the left). The sources, in the specific case and in similar situations, contain different information.
Invention No. 4 from measure 15 to measure 32 – Manuscript belonged to W.F. Bach with notes by J.S. Bach (the upper stave has a French G-clef, placed on the first line and not on the second, that is no longer in use)
Invention No. 4 from measure 11 to measure 32 – Manuscript quoted as an autograph of J.S. Bach
Invention No. 3 from measure 25 to measure 33 – Manuscript belonged to W.F. Bach with notes by J.S. Bach (the upper stave has a French G-clef, placed on the first line and not on the second, that is no longer in use)
Invention No. 3 from measure 18 to measure 36 – Manuscript quoted as an autograph of J.S. Bach
We must not forget that the length and character of the ornaments are influenced by the duration of the central note and by the character of the piece and not just by the sign that is used.
The graphic character that we associate with the mordent (measure No. 19 on the upper stave and measure No. 29 on the lower stave from the first quoted manuscript) must not suggest us a rapid and brilliant performance of the ornament.
The context and the analysis of the other fragments, which contain long trills, make us understand that we need to play a trill or something similar, which becomes a structural part of this composition and allows to the harpsichord (and to the modern piano) to sustain the sound.
Starting from this assumption I would perform a prolonged trill even with an instrument like the accordion that has no practical need to support a sound that otherwise would disappear.
Personally, I prefer to start the oscillation slowly and to increase the speed of the trill, keeping the hands independent and closing the trill before the conclusion of the measure.
From the measure 29 as the trill is on the left and is longer, I would not rule out to support it for a couple of bars, to stop on the E and to take it back and then close it with the same previous modes.
The Invention No.6 in E major BWV 777 presents different characteristics compared to the one just analysed, even if they are both in 3/8. The very brief values and syncopation (that gives life to some kind of “rubato”) impose a not very fast performance which allows to enjoy the small dissonances that arise and that after will melt, but we mustn’t be misled by the descending chromaticism that could suggest a dramatic character.
If we don’t stop to the first measures and we take into consideration the whole score, we see that, especially in the second part, the little upbeat mordents live up this piece.
There is a contrast of “affetti” between the brilliant ornaments and the painful chromaticism, but the principal character is the first.
If we analyse the practice of Bach (from the Well Tempered Clavier, especially with regard to the Prelude and Fugue No.9 in E major from the First Book) and of his contemporaries, we verify that the tonality of E major is often a place of serenity, tenderness and lyricism. This piece is no exception and it looks like a “galanteria” for flute from Quantz or Graun.
The thirty-second notes do not indicate virtuosity; they are simply small mordents written in real notes to perform in a soft way, setting them in the context of the composition.
I’d begin with a slightly tie on the right side and separating the octaves of the left. Keep in mind that one of the simplest ways to accent (in the meaning of “highlighting”) a note is to separate it from the previous one; more the separation is wider, the more obvious will be the accent. The accordionists have an instrument that, with the bellows, may propose a big variety of inflections. Unfortunately, with this mode, the emphasis is attributed to both the hands and it may happen, a fortiori in polyphonic compositions, that the different lines require a differentiated articulation.
Of course I am not advocating that we should not use the dynamic possibilities of our bellows, but I consider it important to remember that there are different paths to highlight the notes.
I open a small parenthesis about the “accents” resulting from the articulations to remember that first Couperin and then Rameau, probably by encoding a French seventeenth-century tradition, inserted the separation between the sounds even among ornaments, calling it “Suspension” and indicating it as follows.
F. Couperin – First book of “Pieces de Clavecin” – 1714
J.Ph. Rameau – “Pieces de Clavessin avec une methode pour la mechanique des doigts” – 1724
If we separate the eight notes of the left, we create some small “accents” in moments of clash between the two parts. These dissonances are resolved on the right line that, tying, descends gently on the consonance. As coded, among others, by C.Ph.E. Bach and by Quantz, the dissonance is then highlighted more than the consonance. When the syncopated eight notes do not move with chromaticisms (for example in the upper stave at the measures 9 and 11) we can articulate them a little, but always less than the eighth notes that “break” the syncopations by creating “collisions.” It is the “drawing” of the melodic line that suggests the size of each separation: it will be less between the thirds in the upper stave at measure 9 and wider between the two F-sharp at the beginning of measure 11 (always in the upper stave). In this way we are able to create that waviness, which we have spoken about, that gives life and direction to the performance.
The Invention No.14 in B-flat major BWV 785 gives us the opportunity to continue the discussion on ornamentation that I will deal with in the next article.
The sixteenths notes groups are nothing more than “mezzi circoli”, some ornaments of vocal origin with a development that covers a third; it is not about moments of virtuosity, but of ornaments written in full. On one hand, therefore, it is necessary to take the time to properly pronounce the “mezzi circoli”, on the other you must still maintain a fluid performance for the binary pulsation of the measure.
The tonality of B-flat major is usually used to express a joyful character, but it is often associated with a certain momentum and this piece is definitely full of echoes, arpeggios and liveliness.
The sixteenths notes can be played untied and lightly or with a tie between every two notes, but it is important that the musical discourse never stops flowing.
Just a little tip on the performance of “mezzi circoli” before closing the article: if we have to search for a bound and slightly irregular trend in the pronunciation of the ornaments I would focus on the fingering and on the gesture.
In particular I would use for all “groups” the three middle fingers (2-3-4-3-2 or 4-3-2-3-4) and, by reducing it to the minimum, I would accompany the articulation with a small rotation of the wrist that can help to effectively characterize the ornament.
I conclude giving to my readers a news about an interesting masterclass on the Well Tempered Clavier by J.S. Bach. The pianist Gianluca Luisi will hold on May 19th and 20th a masterclass at the Conservatory of Parma. It will be the second occasion, in a few months, to deepen the study of this important work by Bach and it will follow the masterclass held by the harpsichordist Enrico Baiano.
These two dates are an integral part of the “Laboratorio Tastiere e Prassi Storiche”, a project that involves the “Keyboards Department” and the “Early Music Department” of the “A. Boito” Conservatory of Parma and the Harpsichord, Piano and Accordion teachers. The objective is to go to the roots of Bach language, identifying the character of his compositions and understanding how each of the involved instruments can perform the peculiar “affetti” of this repertory, complying with its own technical and expressive skills.
I thank Emilia Fadini and Marco Farolfi for valuable suggestions and references to sources.
(Translated by Marta Cogotti)
The Emiolia (Greek term that indicates the 3/2 ratio) is a rhythmic formula used in cadence which involves a change from a binary subdivision to a ternary. In our case, considering the nucleus of two measures, we pass from the two accents (one on each measure) that characterize the piece, to the three accents (one on every two octaves) of the cadence of the measures 16-17  Recall that the aspirants who were accepted as students by J.S. Bach had, at first, to copy all the material (Inventions, Suites, Well-Tempered Clavier ...) before using it for their studies. So we have many versions, all reliable, of the same pieces   See the third article for the references on the quoted treatises  See the fourth article about Thesis and Arsi  For the ornaments the references to keep in mind are the singing and improvisation. If possible, you should always try to tie them (within their development) and in a manner not too mechanical  This fingering can be adopted on the piano accordion and on the (wrongly called) chromatic accordion and can also be used on the left hand with minor thirds
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