Organistrum: its tuning and keyboard

Organistrum: its tuning and keyboard

ORGANISTRUM : ITS TUNING AND KEYBOARD.

 

The aim of the present article is to present the ultimate result of my research on the possibility of rebuilding the Organistrum (Giuseppe Antonio Severini, Organistrum. Un caso di archeologia sperimentale. Tipheret, 2020). Italian text only.

1.Sources and features

The information we have on the instrument comes from a dozen images in books and works of art of the 12th century.

Constant elements

  1. The Organistrum has an « 8 » shape, with a rectangular extension.
  2. The dimensions are such as to occupy the knees of two men seated side by side.
  3. The wheel and the crank are a characteristic element, as are the three strings, in one case two, in one other perhaps one.
  4. The row of keys ends within the middle of the string.

Variable elements

 The number of keys can change: 6 to 11 (or 12).

 

Unknown elements

 I. There is no information about the tuning and the musical scale but from a plate in Martin Gerbert, De cantu et musica sacra, 1774. The same drawing gives an idea of the possible mechanism of the keys.

II. We know nothing more about the inner structure of the keyboard.

 

From these premises it follows that the replicas of the Organistrum so far attempted are at least partly hypothetical.

This obviously concerns the Variable elements  and the Unknown Elements.

Almost all the replicas take as a model the Organistrum of the Portico de la Gloria of Santiago de Compostela because, compared to all the other representations it is the richest in details, it has the maximum number of keys, it occupies the most important location.

 

There are 12 keys within the octave, the first of which should be the nut : they are definetly too many, unless you want to conclude that this is a chromatic keyboard.

Another arbitrary element lies in the choice of the generally adopted fifth and octave tuning, inspired by the organum parallelum polyphonic technique, described in texts that precede any known depiction of the Organistrum by at least a century or two. Instruments made following these hypotheses have little use in the performance of medieval music.

 

2. A different solution

In search of a different solution, I found myself reconsidering two objects that are certainly of the first level.

 

A.) The only drawing of the keyboard that we have left, complete with indications on the scale and on the structure of the keys, is the one copied by Martin Gerbert from a 12th c. manuscript, now lost, in Saint Blaise monastery.

Gerbert's keys have been interpreted as revolving bars with a long "spatula" tangent placed under the strings. The tangent would be brought into contact with all three strings simultaneously through a rotation. This system does not work in practice.

I prefer another interpretation of this drawing: the eight keys would be rotatable or lever acting from above the strings, pressing them against fixed frets, and it works.

Gerbert provides a scale for the instrument: from C to the next C with a single accidental, Bb. The fact that the intonations of the other two strings are not indicated leads to the conclusion that :

  1. they all had the same frequency;
  2. were in C with different octaves;
  3. Gerbert has forgotten to copy them.

The indicated scale is the canonical one and logically must be respected. The indication for the tuning being incomplete, this does not mean that it should be overridden. It is preferable to stick to hypotheses 1. and 2.

So we are faced with a diatonic instrument capable of producing all the intervals of the diatonic scale with a continuous sound. As several authors have observed, it seems to be an evolution of the Monochord. What could this instrument be used for? To provide a certain reference of the notes (a tuner), to play pedals in polyphony helping the singers in intonation.

 

B.) The musical repertoire coeval with the representations of the Organistrum, all of the 12th century, gives us more suggestions.

The manuscripts of Limoges, Winchester, Santiago de Compostela and Paris (Notre Dame), show an interesting two parts polyphonic repertoire. The scales are strictly diatonic. The only alteration used is Bb. These compositions were sung and intended for the liturgy. Many of these, called organum floridum or melismaticum, consisted of a bass vox principalis, and a higher vox organalis. Each note of the vox principalis corresponds to groups of many notes of the vox organalis. The extension of the vox principalis in the Magnus Liber organi of Notre Dame is mostly from C3 to D4, rarely up to F4. The compositions in the F key start at A2 and jump to C3, never requiring B2 and Bb2.

It is possible that the Organistrum as described by Gerbert effectively entered into the performance of these parts.

 

3.More than eight keys.

How should we consider keyboards with more than eight keys?

They are actually only two:

  • organistrum from Collegiata de Toro (Spain) : the nut + 9 keys ;
  • the one from Santiago de Compostela : the nut + 11 keys.

I think the most realistic keyboard is that of Toro, which only adds one tone (D) to the octave.

In the case of Compostela it is very difficult to think of an extension of the diatonic keyboard by two tones and a semitone without visibly exceeding half of the diapason. The Santiago instrument, certainly the most beautiful, has preponderant symbolic value, as amply shown in my book. The 12 keys do not want to indicate the intervals of the scale of the instrument, but those of the cosmic harmony according to Pliny, as can be seen listed next to many grids of planetary latitudes in 11th and 12th century manuscripts of astronomical content.

 

Plinian Harmonia besides Planetary latitudes graph from Trinity College Cambridge, ms R15.32, p.6

The setting of the instrument at the center and at the top of the Portico describing the Glory of Heaven, the decorative details and the fundamental measures of the instrument have an evident astronomical and theological inspiration. It's important to underline that this sculpture, belonging to a masterpiece of the highest level, as one of the three most important sanctuaries of Christianity, deserved great symboilic significance.

 

4.Acoustic results

As with all theories, a crucial aspect lies in the experimental verification.

I have listened to many instruments, others I have heard in recordings, I built four different types myself. My conclusion is that the most coherent and most convincing version, with the most pleasant sound, is the one with the three strings in C3 and a diatonic fingerboard with levers acting over the strings.

 

Watch the videos:

 

 

 

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ORGANISTRUM.  The book  2020

ORGANISTRUM. The book 2020

The Organistrum is depicted in a dozen works of art of the 12th century, it is rarely mentioned in contemporary written sources and disappears at the beginning of the 13th century. Despite the brevity of its life, this instrument boasts a prominent role within the medieval Organology. This is due to both the originality and ingenuity of its construction, and its prominent position among the sculptures of the famous Portico de la Gloria of Santiago de Compostela cathedral, one of the three most important shrines of Christianity. 

Since musicologists and organology experts dedicated little attention to the Organistrum, we luthiers were to perform the historical survey, though not necessarily equipped with the specialized knowledge necessary. Some of our ideas, mainly those concerning the tuning and the structure of the keyboard, might therefore be rather arbitrary or insufficiently grounded. The negative evaluation given by the specialists of medieval music only adds points to the concerns. In the performances of the last thirty years, the presence of the Organistrum is, as a matter of fact, absolutely marginal. Just consider the discography - were it not mentioned in the sleeve notes, it would be difficult to even notice the instrument’s presence. Its function is mostly reduced to the performance of drones, barely audible at the beginning and end of the rare pieces in which it is used. In live performance, the instrument is often exhibited in the center of the stage as an unusual object, one definitely bizarre: we know how this category of the bizarre is inherent to our vision of the Middle Ages. Even in this case, the acoustic presence of the Organistrum remains unsatisfactory, especially when it is inserted in rather improbable medieval “big orchestras".

Moreover, musicians within the folk / rock scene have used the instrument occasionally, amplifying and distorting its sound, adding no merit to it.

To conclude, the field ultimately came to produce an instrument as showy as it is devoid of musical value: one destined for museum windows rather than concerts.

Such an inglorious outcome can be explained in two ways: either the Organistrum should really be considered an almost ornamental object, or its reconstruction is at least in some points flawed.

To solve these doubts and define the entirety of the issue, it was necessary to undertake a new phase of research, geared towards understanding the actual historical physiognomy of the instrument. 

In the first phase of my study, I carried out research pertaining to an ordinary study of Organology. Failing to solve many of the problems that were arising, I conducted further investigation in new directions.  

The language of symbols emerges from a deep substratum of culture which, through art, reveals the presence of archetypal forms of very ancient origin.

The studies of Jurgis Baltrusaitis, for example, have demonstrated how many elements of medieval European architecture and decoration come both from the Roman world and, through the trade of manuscripts, pottery, jewelry, fabrics, from the Middle East and from even more distant areas, such as Persia, India, and China. From his studies, it emerges that the cultural heritage of peoples is equally composed by images and concepts that have very ancient roots and testify to an ancestral circulation of ideas and experiences dating back to even (occasionally) prehistoric times.

The Organistrum probably never quite made it past particular social and cultural contexts (that of religious communities, monastic or urban, on the way of pilgrimage or inside the cathedral schools), and continued to be used, together with the Giga, for only barely over a century.

Within this context, it had to play a particular function and took on a symbolic value in its representations. It is therefore essential to broaden the investigation beyond purely technical and structural elements. We must turn to the ideology, theology and spirituality that lively characterized its fermenting cultural environment. 

I have identified three main sources of reference: the Christian exegesis of the Bible, the school of Latin Platonism and the Jewish Kabbalah.

To buy the book (Italian ):

www.tipheret.org/product/organistrum 

Replica of Compostela Organistrum  by Giuseppe Severini

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ORGANISTRUM and its MAGADA  in M.Gerbert's drawing

ORGANISTRUM and its MAGADA in M.Gerbert's drawing

This famous image comes from Gerbert's pubblication entitled: De cantu et musica sacra, written in the 18th century.

The author copied a drawing from a 13th century manuscript, now lost. It is considered the most important written source regarding the instrument called Organistrum : it shows clearly its general shape, the number of strings, the presence of  a cranck and a wheel, the keyboard and the musical scale.

 

Unfortunately, the information about the tuning is incomplete: only one string out of two is indicated: c.

May be the author judged this indication was enough (intelligenti pauca), so, we could consider two solutions:

- all three strings tuned in c,

- one in c and the other two "in harmony ", i.e. c, g, c'

 

Since the keys seem to operate the three strings at a time, we would be able to play a whole c-c' diatonic scale in the first case and a sequence of parallel fifths and octaves in the second one.

 

The last pattern has seduced many luthiers and musicians in the last decades, cheated by the erroneous attribution to Odo de Cluny (10th century) of  a manuscript entitled "Quomodo organistrum construatur".Their idea was that the Organistrum  - certainly devoted to sacred music - could have been related to the contemporary polyphonic technique called Organum parallelum

But the famous text, once considered the earliest source for the studies about this instrument, has been recently recognised as a 13 th c. work by anonymous author.

 

Since the story of the instrument has been relocated in the right period,  the 11th and 12th century,  we observe that the musical scene looks rather different. Many anonimous composers were developping much more sophisticated and interesting polyphonic techniques: discantus, organum duplum  and organum melismaticum or floridum , organum parallelum  being no longer attested.

 

A new reason was then adduced by some authors to justify a parallel fifth and octave tuning: the misleading interpretation of the letters written around the instrument wheel in Gerbert's drawing: m a G/ a D a.

These letters could allude to one or more tuning patterns of the instrument: a D a, or d D a.

But it is rather difficult to explain the first part: m a G. Eventually,  all  interpretations based on such letters cannot match with a C scale.

 

In fact, the letters compose the word magada  that  means bridge. This word was used frequently in latin 11th and 12th century music treatises, to indicate the bridges of the Monochord. It comes from Ptolemeus Harmonikai  and was transmitted  by Boetius in De institutione musica, lib.IV, chapter 18, in his description of the monochord: "duo semisperia, quas magadas greci vocant". Thus, the monochord bridges were half spheres, as stated by Ptolemeus, in order to touch the string in one point only.

 

It is interesting to point out that 11th c. treatise entitled  Divisiones monocordi, inc. Studiosis necdum in musica provectis hec de monocordo...

M 17 sup (Biblioteca Ambrosiana, Milan ) still reports the name magada to indicate the monochord bridges, while this word is changed into rotulum in 13th c. manuscript  Quomodo organistrum construatur, in which the word rotulum  logically indicates  the semispherical bridge and not a wheel (rota).

 

As a matter of fact all these texts and others called Mensura organistri  are concerned with the description of the pythagorean diatonic C scale

and the method used to draw it by ruler and compass following simple ratios and they never describe any musical instrument but the monochord.

 

I would like to quote some lines from Francis W.Galpin, Old english instruments of music. 1910 (old books are not always the worse ones !):

"The Organistrum, for such was its name at first, is undoubtedly derived from the Monochord, a simple contrivance for ascertaining the intervals of the musical scale by a series of movable bridges".

 

In medieval Europe the C diatonic scale had an outstanding theorical value both because it offers the essential pattern of the Pythagorean system and because it contains the basic natural exachord of Guido d'Arezzo, but in sacred music practice the more frequently used modes were protus autenticus (D) and plagalis (A), protus autenticus  offering also the musical scale  generally associated to musica mundana or music of the spheres.

 

Then, even if I would love to say that the wheel instruments were invented to make the continuous "circular" sound of the heavens audible, I definitely can't.

First of all the scale is not the planetary one, secondly the presence of b betrays a practical concern, and finally, you cannot hear all the  sounds together.

  

So, I guess that, with all strings tuned in C, the Organistrum could be useful in backing the tenor part of compositions called Organum melismaticum, like the Romanesque pull-organ.

 

Watch the videos:

 

https://www.youtube.com/watch?v=yMN180XdYeY

https://www.youtube.com/watch?v=nrZsIOIWK-o

 

 

The book (2020):

http://www.tipheret.org/product/organistrum/?fbclid=IwAR1pCpvrZoeboCslNiv2n2ZuWeoTJfQwI34C2Kuo8Px8J-QJn_AiPS9KH8A 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Chartres 12th century psaltery (English/French/Italian text)

Chartres 12th century psaltery (English/French/Italian text)

 ENGLISH

On 2017, April 20th I was asked by "Instrumentarium de Chartres" to go to Chartres to study one of the Psalteries sculpted in the so called Portail Royal (1144).

 

In front of the Cathedral I found a van equipped with an elevator, in order to reach the sculpture to study it easily.

There I discovered that the instrument has 10 courses of strings instead of the  9 previously  declared.

I could measure and observe all the details of this object, then I was asked by "Instrumentarium de Chartres" to build a copy of the Psaltery to be held in the Cathedral permanent exhibition of medieval instruments and to be played occasionally by professional musicians.

My instrument is carved in two blocks of poplar and beech. The two halves glued together, poplar at the top, beech at the bottom

The  iron pegs  are fixed in the right side of the back. Two straight bridges in Beech are glued over the top.

 

The top has been left free from varnish.

ITALIAN

Dopo una lunga fase di studio e di sperimentazione si è compiuto il lavoro di ricostruzione di uno dei due salteri scolpiti nel Portale Reale della cattedrale di Chartres.

LE CORDE adottate sono in budello per le seguenti ragioni.

  1. I salteri precedenti il secolo XII, per lo più di forma rettangolare, fanno pensare a una filiazione dalla Kithara greca per tramite di quella romana e quindi a un’incordatura scalare in minugia;
  2. I ponticelli dei due salteri del portale reale presentano entrambi angoli alla base di 72°, non lontani dunque dall’angolo retto, quindi più vicini ai salteri antichi rispetto al successivo e molto più elaborato salterio a “muso di porco”, probabilmente incordato in metallo;
  3. Esaminando il salterio della “Musica”, molto simile a quello del vegliardo da me riprodotto, l’allaccio delle corde al ponticello sinistro fa pensare a un sistema simile a quello del Liuto e quindi indicare corde in budello.

DIAMETRI E ACCORDATURA:

0.55  Re - Do4, 0.60  Si - La,  0.65  Sol ,  0.75  Fa,  0.80  Mi, 0.85  Re, 0.95  Do3,  

1.00  Si2.

LA POSIZIONE  

ideale per suonare questi strumenti è la stessa che si vede rappresentata nei due casi esaminati: appoggiato sul lato minore e suonando le corde in posizione verticale con un plettro.

 

FRANCAIS

Le travail de reconstitution d’un des deux psaltérions du Portail Royal de la cathédrale de Chartres c’est achevé après une longue phase d’étude et d’expérimentation durée à peu près deux ans.

On a décidé d’utiliser des CORDES de boyau, pour les raisons suivantes.

  1. Les psaltérions avant le XII siècle, de forme rectangulaire, rappellent la Kithara grecque et romaine, donc avec les cordes de boyau  de plusieurs diamètres différentes ;
  2. Les chevalets des deux psaltérions du portail royal ont les angles à la base de 72°, pas loin donc de l’angle droit et sont plus proches aux psaltérions anciennes que à ceux du siècle suivant « a muso di porco », à la forme beaucoup plus élaborée et avec cordes en métal;
  3. En observant le psaltérion « de la Musique » du portail, très semblable à celui du Vieillard que j’ai reconstitué, on voit que les cordes sont attachées au chevalet de la même façon d’un Luth, ce que nous fait penser à cordes de boyau.

DIAMETRES ET ACCORD:

0.55  Re - Do4, 0.60  S i- La,  0.65  Sol ,  0.75  Fa,  0.80  Mi, 0.85  Re, 0.95  Do3

1.00  Si2.

LA POSITION DE JEU

idéale pour jouer de cet instrument est la même qu’on voit dans les sculptures: l’instrument est appuyé sur la cote mineure et joué par un médiateur avec les cordes en verticale.

 

 

The instrument is now kept in the exhibition of instruments of Instrumentarium de Chartres, "sous le parvis de la Cathédrale".

 

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polyphonic keyboard

Organistrum: new polyphonic keyboard

My reconstruction of the instrument is mainly based on my own interpretation of its possible musical function. Since I want to consider it  as a genuine polyphonic instrument I  invented  a  special  keyboard, fit for 12th century two voices polyphonies, suggesting also a different managing of the wheel.

Keyboard

By tuning the strings  either:  A – d – a   or:  A – e – a    we get an overall extension of two chromatic octaves (minus the last semitone). Before lifting each key, the performer  can choose which string he is going to touch, simply by turning the key to the proper position: the first one allows him to operate on the bass string, the second on the middle one, the third on the higher string.

Thus it is possible to play two different melodic lines simultaneously. In Santiago sculpture the hands of the musician on the right are on the third and on the fifth key. This means he is playing  -c, g -  rather than  -d, f -  bichord on bass and middle strings,  or  - g, c’  rather than  - f, d’- bichord on middle and higher strings (first tuning).

 

First string                              a..       a#      b     c’     c’#     d’

Middle string                         d..       d#      e      f      f#      g    

Bass string                            A..       A#      B     c     c#      d

Keys                                      0          1       2     3       4      5

 

 In position 4 the key is provided with two tangents so as to act on  second and  third strings (tuned either in Fifth or Fourth)  at the same time to perform  Organum parallelum, leaving the bass string as a drone. 

How they calculated the semitones progression

Known medieval texts neither describe  nor discuss about the possibility of a chromatic scale. But, reading Boethius's De institutione musica, easy to be found in monastic libraries since 9th century on, the monks could learn a lot about semitones both from pythagorean tradition and from Aristoxen's. There are only few lines, but enough, dedicated to the description of Aristoxen's practical method to divide the monochord. From this source the medieval scholar could learn a practical method in order to draw a correct chromatic scale of 12  tempered semitones. We discuss about this in another blog in this website

http://www.liuteriaseverini.it/index.php?option=com_k2&view=item&id=24:organistrum-symphonia-caelestis-santiago-de-compostela&Itemid=1014

connecting astronomical and musical  knowledges through 10th and 12th centuries. Anyway, this idea comes from very early roman sources: Plinius and Boethius. In case the author of Santiago instrument intended to describe a revolutionary full chromatic/polyphonic keyboard we can suppose he was aware of that very ancient tradition.

 

Wheel

On the other side, the musician who is in charge of turning the crank, by a smooth, even movement of his right hand,  can also lift one or even two of the strings from the edge of the wheel with his left hand in order to stop them vibrating. This way you can either avoid conflicts between the voices or stop  undesired drone effects.  

 

LISTEN TO POLYPHONIC SYMPHONIA:

https://www.youtube.com/watch?v=UpZP62BPVGY

 

BOOKS:

http://www.tipheret.org/product/organistrum/?fbclid=IwAR1pCpvrZoeboCslNiv2n2ZuWeoTJfQwI34C2Kuo8Px8J-QJn_AiPS9KH8A 

                                                                                      

 

 

BUILDING A REPLICA OF SANTIAGO DE COMPOSTELA INSTRUMENT

I chose one big  Red Willow (Salix purpurea) planck, seasoned in nature, from which I  carved the sound box and the base of the keyboard in one piece, average thickness  8-10 mm. Flat back, flat sides as in the original. 

GENERAL MEASURES:                      

 Total length    940mm                                                                                                           

Max width      230mm                                                                                                              

 Depth              80mm                                                                                                                

 Diapason        720mm

 

In the bottom of sound box I drilled a 10mm hole for the wooden axis, made of Beech (Fagus silvestris). Axis ends into another hole of 10mm drilled directly with no axle box in a wooden bar (Spruce) 15mm thick, glued between the two lobes of sound box which has been carved out of one piece of Spruce (Picea  abies) 8mm thick with no other bars glued underneath. Keyboard  box is independent from the body of the instrument and can be easily removed to modify  general level of the bars, changing their angle with the strings or making reparations. The 11 bars of the keys, diameter 10mm, are of Pine (Pinus nigra) and the 55 pivoting tangents of Beech. The problem of the distances among the bars is discussed in the present article. To avoid noise made by the bars returning to their previous position, after being pulled up to play, a stripe of cloth has been glued at the bottom of the keyboard. The carved lid has been made of Spruce, 8mm thick and is simply interlocked with the body of the keyboard without any hinge or other device.

The wheel, 11cm  wide and 20mm thick is of Walnut (Juglans regia) and forced on  wooden axis without any screw, nail, or wedge. No axle box at the end. The Beech crank , stuck in the square end of the axis, can be easily removed. The soundboard is glued to the body of the instrument , no sound pole in it. The bridge is of Poplar (Populus nigra) reinforced with a Beech edge. The tailpiece  of Chestnut (Castanea sativa) is linked to the bottom of sound box by a leather lace. Tuning pegs are of Beech, no need for a tuning key. Two light  layers of pure almond oil have  been used as  finishing . Gut strings: 0.80, 1.10, 1.40mm.

 

 

 

 

 

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THE MAGIC OF SHELLS : NEW  METHODS  IN MEDIEVAL LUTHERIE

THE MAGIC OF SHELLS : NEW METHODS IN MEDIEVAL LUTHERIE

THE MAGIC OF SHELLS : NEW  METHODS IN MEDIEVAL LUTHERIE

LA MAGIE DES COQUILLES: DES NOUVELLES TECHNIQUES POUR LA LUTHERIE MEDIEVALE

LA MAGIA DELLE CONCHIGLIE: NUOVE TECNICHE PER LA LIUTERIA MEDIEVALE

English

Shells are just an image to show new ideas about medieval methods in medieval Lutherie. It is a sort of revolution in some stringed instruments buiding. Descarding the methods used for classic Violin or Guitar buiding,  and “chantournage” method too, being not philological at all, we have only to ways to build the instrument: hollowing the body-neck block out of one piece, then adding the sound board, or carving the whole block including sound board, adding the back. We can observe that the first method is adopted in Citoles making, for example those in  British Museum and Met, NY, and the Gittern found in Poland or in Caterina de Vigris’s Viella (Bologna), while the second one is used in Irish harps (Trinity College, Dublin). In folk instruments we observe the same buiding methods: the first one widespread through Asia and Northern Africa, to build all kind of plucked and bowed instruments, often with  sound board made of skin, while the second one can be detected in British Clarsach, Norwigean Langeleik and Finnish Kantele, the last two sometimes without the back, as they were used lying them  on a table (H.Panum, Stringed instruments of the middle ages.London,Reeves,1971). We follow necessarily  the first method to build round back instruments like Gittern, Rebab and Rebec, while  the second method could be adopted to build flat back instruments like Harp, Psaltery, Viella and Citole. The reason is that since the most important part of the instrument is the sound board, the first attempt the medieval luthier should make, whenever possible, is to give unity to the block  neck -sides - sound board, leaving the back as the last piece to be added at the end. This idea is suitable both for plucked instruments and bowed instruments as well, since Viellas had no soundpole at the time. I built four Viellas with this method: one from a XII century sculpture in Graville Abbey (Le Havre), one from a XIV sculpture in Nicosia Cathedral (Enna), another one from a XII c. sculpture in Torme, Burgos and the last one from Toro Cathedral. The best results I obtained using Fir for the body and Cypress for the back.  Then I built four Psalteries from Chartres cathedral: the upper part carved from one piece of Poplar or Fir, the back of Beech, Pine or Cypress. These instruments have brilliant, lively sound and rich resonance too. Anyway, we are not sure that Spruce was used for sound boards during the Middle Ages, so that some luthiers use other kind of wood: this fact could reinforce the idea of the "back-carving method".

https://www.youtube.com/watch?v=S35WneRycw4

 

Francais

La coquille est un point de depart pour  ma reflection autour des techniques de la lutherie medievale. On a abandonné de très long temps la technique moderne (Violon, Guitare)  dans la réconstitution des instruments à cordes du Moyen Age. La technique du “chantournage” n’est pas philologique. Donc nous restent deux voies pour faire l’instrument: creuser le manche et la caisse dans un seul morceau de bois et après ajouter la table d’harmonie, ou creuser le manche, la table d’harmonie et les cotés dans un seul morceau et à la fin ajouter le fond. Les Citoles du British Museum et du Met NY, la petite Vielle de Caterina de Vigris (Bologna) et le Gittern du XIV siècle  retrouvé en Pologne sont faits avec la première technique, tout comme les instruments traditionnels d’Asie et du Nord de l’Afrique, souvent avec des tables d’harmonie en peau.  Les Harpes du Trinity College (Dublin), XV siècle,  sont faites avec la deuxième technique, tout comme les Langeleik de Norvège et le Kantele de Finland (H.Panum, Stringed instruments of the middleages, London,1971). S’il  est necéssaire travailler dans la première facon pour faire des instruments au fond courbe, comme le Gittern, le Rebab, la Rebec,  dans les instruments au fond plat comme la Harpe, le Psalterion, la Citole et la Vielle,  on pourrait bien renverser le processus, l’élément le plus important étant la table d’harmonie, creé avec le manche et les cotés dans un seul pièce, en recevant le fond à la fin. On ajoute aussi deux observations faites par plusieurs luthiers: jusqu’au XVI siècle on n’avait pas d’ame dans les instruments à archet et les tables d’harmonie n’étaient pas forcément en Epicea. Donc est particulierement interéssant essayer la construction des instruments à cordes du Moyen Age de cette facon. J’ ai construit cinq Psalterions en creusant la partie supérieure dans le Peuplier ou Sapinet le fond en Hetre, Pin ou Cyprés. Le son est particulierement clair et riche d’harmoniques. J’ai fait quatre Vieles ovales (Graville, Nicosia, Torme, Toro) avec le corps de Sapin et les fonds en Hetre ou Cyprés, pas d' ame, le son étant vif et clair.

https://www.youtube.com/watch?v=S35WneRycw4

 

Italiano

Con questo paragone intendo presentare una nuova ipotesi sulla tecnica costruttiva nel campo degli strumenti a corda del Medioevo. In pratica si tratta di un ribaltamento rispetto ai procedimenti usati finora. Se la tecnica di assemblaggio dello strumento in pezzi separati: fondo, fasce, tavola, manico è stata da tempo abbandonata, poiché considerata non filologica, anche la tecnica chiamata “chantournage” non  sembra essere documentata storicamente e quindi da accantonarsi. I procedimenti rilevati dall’esame degli strumenti sopravvissuti sono due: scultura dell’intero corpo dello strumento dal massello con aggiunta di tavola armonica  e scultura dell’intero corpo con aggiunta del fondo. La prima tecnica si vede applicata nelle Citole (British Museum, London; Met, NY) , nel Gittern trovato in Polonia e nella Viella di S.Caterina de Vigris (Bologna), la seconda nelle Arpe irlandesi (Trinity College, Dublin). Esaminando la liuteria di tradizione osserviamo che il primo procedimento è ampiamente usato in tutta l’Asia e nel Nord Africa per costruire ogni tipo di strumento a corde pizzicate o ad arco, con tavole armoniche per lo più in pelle. Il secondo procedimento si riscontra nelle Arpe tradizionali del Nord Europa (Clarsach) e nelle cetre da tavolo scandinave come Langeleik e Kantele. Per gli strumenti a fondo bombato - Gittern, Rebab, Ribeca - il primo procedimento è irrinunciabile; per gli strumenti con fondo piatto –  Arpa, Salterio, Citola, Viella -  credo sia preferibile il secondo. La ragione nasce come risposta a una domanda: qual è in questi strumenti la parte più caratterizzante? Certamente la cassa bombata negli strumenti del primo gruppo, in cui talora troviamo anche tavole armoniche in pelle. Nel secondo gruppo invece sia la tavola sia il fondo sono piatti o lievemente convessi, dunque bisogna identificare quale sia la parte determinante per la formazione del suono, tenendo conto che la tavola armonica ha il principale ruolo vibratorio e il fondo quello di semplice riflessione. Questo vale a maggior ragione negli strumenti a corde pizzicate, ma soprattutto nelle Vielle, dove ancora l’anima non andava a congiungere le due parti della cassa. Quindi si può credere  che il costruttore, volendo dedicare un’attenzione speciale alla formazione del suono, prediligesse lavorare con grande cura al blocco: manico, tavola armonica, fasce laterali, mantenendo in tal modo una vantaggiosa unità della struttura ai fini della migliore propagazione delle vibrazioni. Il fondo poteva essere lavorato a parte e applicato infine a chiusura della cassa. I riscontri pratici di questa procedura sono, come già detto, nei Clarsach,  in Kantele e Langeleik, (H.Panum, The stringed instruments of the Middle Ages. London, 1971). dove talora il fondo è mancante, perché lo strumento veniva poggiato su un tavolo di legno per essere suonato, e in alcuni esperimenti da me fatti su Vielle e Salteri. Ho ricostruito una Viella ovale da una scultura del secolo XII nell’Abbazia di Graville (Le Havre) e un'altra da una scultura del secolo XIV nella cattedrale di Nicosia (Enna), altre due da sculture di Torme e Toro, in Spagna, Nel primo caso ho utilizzato Pino silvestre tagliato di quarto per il corpo e Faggio per il fondo, nel secondo Abete bianco tagliato di quarto per il corpo e Cipresso per il fondo, negli altri Abete e Cipresso. In tutti gli strumenti non è inserita l’anima. I risultati sono stati più che soddisfacenti, in particolare osservo che vengono esaltate le frequenze acute e medie, evitando la timbrica cupa che spesso ho sentito nelle ricostruzioni di Vielle. Ho poi costruito quattro Salteri dalla cattedrale di Chartres,  con tavola e fianchi in Pioppo o Abete, due col fondo in Faggio, uno in Pino laricio, uno in Cipresso. Anche questi strumenti hanno dimostrato sonorità brillante e grande risonanza. Se pensiamo che di recente molti liutai dubitano che nel Medioevo si utilizzasse l’Abete rosso per le tavole armoniche, e le fanno con altri legni, ad esempio gli stessi usati per la cassa, e se pensiamo che quasi tutti sostengono che l'anima non venisse usata fino al XVI secolo, assume più valore la mia tesi della costruzione "al contrario" degli strumenti ad arco a fondo piatto.

https://www.youtube.com/watch?v=S35WneRycw4

 

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PSALTERIONS  DU PORTAIL ROYAL (1144) DE LA CATHEDRALE DE NOTRE DAME DE CHARTRES

PSALTERIONS DU PORTAIL ROYAL (1144) DE LA CATHEDRALE DE NOTRE DAME DE CHARTRES

Dans le portail Sud de la Cathédrale de Chartres, dit Royal, il y a quatre représentations de Psaltérions.

Le premier instrument, très abimé, présente 5 cordes sur deux chevalets presque parallèles.

Le deuxième psaltérion a dix cordes, les angles entre les chevalets et les cordes de 72°

Les deux psaltérions les plus en évidence, celui du premier Vieillard de l’Apocalypse et celui de la Musique, partagent la même structure :  neuf chœurs forment avec les chevalets un trapèze régulier, les angles à la base sont de 72° [1].

Le premier psaltérion a un dixième chœur, bien caché sous le manteau du Vieillard, invisible  par le bas. 

L’autre  à neuf chœurs, bien qu’il y aurait toute la place pour y mettre un dixième. 

(Photos des instruments : www.instrumentariumdechartres.fr )

Dans la littérature médiévale on trouve fréquemment la dénomination Psalterium decachordum, tirée de l’Ancien Testament, Psaume 32. Saint Jerome (Epistula ad Dardanum) affirme que l’adjectif decachordum fait allusion à la loi morale : le Decalogue. On se demande pourquoi représenter avec neuf cordes des instruments qui habituellement en avaient dix en les mettant en plus en grande évidence dans les mains du premier Vieillard de l’Apocalypse et dans l’allégorie de la Musique représentée parmi les Arts Liberaux.  Pour répondre à cette question on doit essayer d'imaginer les différentes points de vue du public médiéval.

Les visiteurs illettrés voient les instruments et pensent à la suavité des choeurs angeliques.

Les musiciens illettrés reconnaissent les instruments et comptent les cordes : ils pensent à un erreur ou à une nouveauté dans la musique.

Les visiteurs cultivés dans les Arts Libéraux savent que le Neuf peut avoir différentes significations. 

A' ce propos, la pensée catholique orthodoxe, suivant Isidore de Séville, considérait le Neuf comme un nombre imparfait comparé au Dix (Liber numerorum qui in sanctis scripturis occurrunt 10.52.PL 83 : 190). Pythagore, qui dans le Portail Royal de Chartres siège tout près la statue de la Musique, avait consacré la perfection du Dix dans la Tetraktys. En ce cas le neuf cordes feraient allusion à l’imperfection de notre connaissance (musicale), soulignée par Musica enchiriadis (XIX,10-12) et Micrologus (XIV, 16-19).

En suivant plutôt la tradition musicale ancienne, le Neuf, dans le rapport fondamentale 9/8 est considéré  « omnium musicorum sonorum mensura communis » (Boethius, De arithmetica 2,54, CCL 94 A :224) Le rapport 9/8 est associé à la cosmologie mathématique du Timée, transmise par Cicero, Macrobius et Calcidius.  Marcianus Capella affirme que le Neuf « harmoniae ultima pars est » (De nuptiis Philologiae et Mercurii 7.741).

Du point de vue purement arithmétique, au XII siècle Magister Johannes de Séville dans son  Liber Alchorismi de pratica aritmetice, traduction du livre perdu de Muhammad ibn Musa al-Kwarizmi, présente la numération indienne. Il explique que « constat ergo unumquemque limitem 9 numeros continere », il rappelle que neuf sont les sphères célestes et neuf les chœurs angéliques [2].

Guillaume de Conches dans son œuvre  Philosophia ne donne aucune importance au Dix, alors que neuf sont les cercles invisibles du ciel (Liber II, V, 13) et neuf les mois de la gestation humaine (Liber IV, XIV,22-23).

Enfin, le luthier pourrait observer que le rapport entre la première et la dixième corde (cachée ou virtuelle) est de 3/2, la Quinte juste, le rapport  harmonique fondamental dans la théorie musicale pythagoricienne.

Ainsi, l’homme savant pouvait interpréter les neuf chœurs des psaltérions comme symbole du fondement de la divine science harmonique et en même temps de l’imperfection de notre connaissance.

 NOTES

[1] Les psaltérions postérieures, par exemple celui sculpté sur le portail sud, XIII siècle,  de la même cathédrale sont essentiellement des triangles isocèles avec les angles à la base de 45°, ce que permet à 15 cordes de se rapprocher au plus près des mesures théoriques de la gamme diatonique. Voir :  OLIVIER FERAUD (2015), Lecture croisée du monochorde et du psaltérion à travers leur reconstitution. En : L’Instrumentarium du Moyen Age. La restitution du son. Sous la direction de Welleda Muller. Paris, l’Harmattan.

[2] KURT LAMPE (2006), A twefth-century text on the number nine and divine creation : a new interpretation of boethian cosmology? en : PIMS, gen.2006.

 

 

 

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LA VIELLA DI NICOSIA

LA VIELLA DI NICOSIA

Nel 2012 iniziai a studiare la possibilità di ricostruire una Viella - un antenato medievale del nostro Violino - basandomi su iconografia siciliana. Ricordavo di aver notato alcune raffigurazioni di strumenti musicali durante una visita alla cattedrale di Nicosia (EN), così, anche approfittando del desiderio di due registi acesi, Daniele Greco e Mauro Maugeri, di girare un documentario sulla mia attività di liutaio, mi recai con loro sul luogo, dove potemmo verificare che i miei ricordi erano esatti. Sul capitello del primo pilastrino sul lato sinistro del portale centrale della cattedrale dedicata a S.Nicola si vedono scolpiti due musici. Uno di essi, acefalo e molto rovinato, imbraccia una Citola, strumento a corde pizzicate simile a una piccola chitarra, di cui si intuisce ormai solo un vago contorno, e l’altro, alla sua sinistra, pure acefalo, suona una Viella ancora perfettamente visibile. I miei due ottimi amici, entusiasti quanto me per la scoperta, decisero di incoraggiarmi e di aiutarmi a continuare le mie ricerche documentandole con fotografie e video professionali. Proseguimmo così alla volta di Messina e di Palermo, dove potemmo raccogliere altre testimonianze sulle Vielle: due sculture nelle rispettive cattedrali delle due città e un dipinto sul soffitto ligneo del palazzo dello Steri. Mentre i registi iniziavano a confezionare un vero e proprio documentario con le riprese effettuate, che vide la luce l’anno successivo col titolo di “SUONI D’OC”, io mi diedi da fare per iniziare lo studio e la ricostruzione della mia Viella.

Iniziai ad esaminare attentamente tutte le testimonianze trovate: tre del periodo compreso fra 1350 e 1380 e una, quella di Messina, del secolo successivo. Alla fine mi resi conto che la testimonianza più attendibile era proprio la prima da cui ero partito, ossia la piccola scultura della Cattedrale di Nicosia. Vi si vedono perfettamente raffigurati tutti gli elementi decisivi: il contorno “a otto” della cassa, i fori di risonanza, la cordiera, il ponticello, il manico e le corde. Unica pecca, la mancanza del cavigliere, andato distrutto nel tempo. Decisi che per questo particolare sarei ricorso al modello visibile nelle pitture dello Steri, coeve al portico di Nicosia, anche se la Viella colà raffigurata era ovale e non “a otto”. Superato questo scoglio dovetti stabilire le dimensioni da dare allo strumento e ricorsi al solito calcolo delle proporzioni tra esso e il corpo del suonatore. Arrivai a definire un oggetto del tutto simile a un Violino attuale per lunghezza e per diapason, ma con la cassa un po’ più larga e profonda. A questo punto bisognava scegliere il legno, anzi i legni e mi decisi per una bella tavola di Abete bianco spessa 4 cm. da cui intagliare il blocco Manico/Tavola armonica/Fasce laterali e una tavoletta da 1 cm. di Cipresso per il fondo. Qui urge una sosta per spiegare una particolarità che contraddistingue l’arte liutaria medievale da quella attuale. Nel Medioevo si usava scolpire lo strumento da un unico pezzo di legno quasi per intero. Negli strumenti a fondo curvo si usava scavare in un unico blocco la cassa e il manico, aggiungendo poi la tavola armonica. Negli strumenti a fondo piatto o lievemente incurvato si poteva procedere anche al contrario, scavando in un solo pezzo manico e tavola armonica e applicando poi il fondo. Entrambi i procedimenti sono accertati in sede storica, ma su tipi diversi di strumenti. Io propendo per applicare il secondo procedimento ogniqualvolta sia possibile e anche questa Viella è stata fatta così. Diversamente, nella liuteria classica e moderna, il Violino viene assemblato incollando le varie parti lavorate separatamente: tavola e fondo scavati, manico con cavigliere e riccio, fasce piegate a caldo ciascuna in tre pezzi giuntati con rinforzi interni in Abete. Così dopo un po’ di giorni di intenso lavoro ottenni la mia ricostruzione della “Viella di Nicosia”, non ancora verniciata ma pronta per comparire nelle ultime scene del documentario. Montai le corde in budello: doppio cantino, altre due corde a distanza di quinta e ottava dalla prima e infine una corda fuori dalla tastiera come si vede chiaramente nella scultura. Questo particolare è interessante: la corda esterna serviva per accompagnare l’esecuzione con un pizzicato o, suonata con l’arco, fungeva da bordone, visto che, per il suo spessore, difficilmente poteva essere tastata. Altra particolarità: lo strumento è sprovvisto di “anima”, quel cilindretto di legno che, in tutti gli strumenti ad arco dal 1500 ad oggi collega internamente la tavola col fondo, raddoppiando quasi l’intensità delle vibrazioni, poiché per i secoli del medioevo non è in alcun modo documentata. Il suono dunque risulta più diffuso e smorzato, adattissimo per accompagnare il canto, cosa molto apprezzata all’epoca dai Trovatori. Lo strumento era pronto ma senza vernice appariva rustico e non finito, però il suono era già bello. Nel corso del Duecento e del Trecento la verniciatura e la colorazione dei legni in liuteria non erano ancora pratiche affermate, spesso una mano di olio di mandorle veniva considerata sufficiente. Mi incoraggiai a suonare la Viella per la scena finale del documentario e così si concluse la prima parte del lavoro. L’anno seguente il film partecipò a diverse rassegne e ricevette un riconoscimento europeo in Slovenia. Io portai lo strumento in Francia al festival TROBAREA di musica medievale a Grasse (Nizza) e alle Journées de musiques anciennes di Venves, Parigi, dove lo strumento fu apprezzato e si dimostrò all’altezza dei suoi simili d’oltralpe, anzi brillò per il suo suono vivace e limpido. A un certo punto mi decisi a dare alla Viella una colorazione noce scuro e tre mani di gommalacca a spirito, con cui oggi si mostra al pubblico. Abbiamo avuto la gioia di presentare il documentario a Nicosia in una riunione pubblica presso il Municipio e ho suonato con la Viella alcuni brani tratti dal Laudario di Cortona proprio sotto la scultura del portale in un momento pieno di emozione e di suggestione. Oggi il nostro strumento si può vedere e ascoltare presso la Casa della Musica e della Liuteria di Randazzo, (www.secolibui.com) aperta tutti i giorni dalle 11 alle 17. Per prenotare le visite tel.349 4001357. Contatti: This email address is being protected from spambots. You need JavaScript enabled to view it..

Oppure direttamente guarda il VIDEO:

https://www.youtube.com/watch?v=j-0hmHv9loQ&t=2s

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Organistrum de Compostela. An astronomical approach

Organistrum de Compostela. An astronomical approach

SANTIAGO DE COMPOSTELA SYMPHONIA CAELESTIS

An astronomical approach

published in:

Mediterranean Archaeology and Archaeometry, vol. 18, n° 4 (2018), pp.345-352.

 

1 : Gate of Glory:

Gate of Glory extrados in Santiago de Compostela Cathedral is crowded by statues bearing different kinds of stringed instruments. At the very top of the gate two of them are playing a beautifully carved and decorated instrument, the so calledOrganistrum.

2 : The top instrument:

This curious object has been largely studied and several reconstructions have been proposed and carried out by scholars and luthiers during the past 40 years, nevertheless some aspects are still uncertain, such as its symbolic significance and its peculiar musical role.

3 :: Symphonia::

Let’s start considering its special location.The statues of the extrados represent the 24 elders of Apocalypse. They can be symbols of Time (24), Music (musical instruments) and Divine symphony (they are heavenly creatures) too.

4 :: Two Performers::

The two performers at the top are very close to Christ’s head, position as usual occupied by angels. If we compare them to the other musicians we observe they look to be the only two actually playing and they are playing the most complex instrument of all. The idea that it could be given a deeper symbolic significance is strengthened by closer observation of its features. A revolving object, the wheel, creates the sound from strings stretched over a sound box made of two equal circles, to which an unusual keyboard is added, equipped with 11 keys, so that the octave is divided into 12 parts.

All this is strange enough and absolutely unique, in XII century atleast !, and we need referring to any kind of theological, philosophical, mathematical and musical theory of the age to give a reasonable interpretation of it. Medieval Latin Platonism, for example, mainly related to Chartres cathedral school, well connected with Paris and Santiago, brings to us interesting suggestions.

5 :: Ordering the Heavens::

Platonists thought that at the beginning of creation, making the World Soul, Demiurgos was dealing with three abstract elements: Being, Sameness and Difference. Establishing the right proportions among sameness and difference, he gave the World Soul the shape of two circles one inside the other and put them into the material World, thus creating both the Sphere of fixed stars and the plane of planetary orbits. Circular motions of planets and stars were thus connected in perfect harmony, like the strings of a well tuned Lyre or the pipes of a well cut Pan flute[1].This set-up is reflected in our instrument.

6 :: Symphonia Coelistis::

A circular sound box, theCircle of Sameness, contains the wheel , that represents planetary motion: the Circle of Difference. This is the origin: the invisible World Soul. Thenanother circle is added, the visible world, Cosmos, with its charming beauty. At lastwe find the keyboard, with 11 keys dividing the octave in parts, the symbol of human mind, which divides and measures in order to understand Natural phenomena. Therefore, the widespread philosophical principle “Veritas est adaequatio intellectus et rei “ (translation: truth is an adjustement between intellect and things) is well represented here, as we can observe that the vibrating string-length (rectilinear thought) is equal to the circumference of each circle of the sound box (Nature and abstract world).

Further suggestions come fromthe analysis of instrument decorations.

  1. A long line of DOTS runs all around the outline of the instrument. They are symbols of the stars. From left to right: first circle, the idea of the stars in the abstract world; second circle, the visible stars; keyboard, our knowledge of the stars (straightened).
  2. The large ROSETTE in the middle represents the Visible World, a circular figure divided in four equal sections by two perpendicular axes. Each section is occupied by a five lobes leaf and twigs (these leaves are similar to those sculpted all around the 24 Elders). The division in four sections may refer to the four elements of material world.

7 :: Diagram of the Seasons

This figure recalls diagrams of the seasons frequently drawn in glosses of IX-XII century astronomical manuscripts or even more elaborated drawings.The main goal of any scholar was to calculate accurately the length of each season in order to obtain an exact and affordable calendar to establish with great accuracy both the dates of Christian feasts and the right hours for prayer in monasteries[2].

8 :: IX-XII centuries decoration patterns ::

Finally, KEYBOARD LID decoration, unique among all other decorations sculpted in the Gate, shows a rare pattern, which had been popular in some areas around the Alps and in Ireland between IX and XI centuries, rather neglected in the XII[3].

9 :: Keyboard ::

Each knot of the interlace corresponds precisely to one key of the 11keys protruding out of the rectangular box. This division in fact is the most puzzling feature of all, as nobody could justify the introduction of a chromatic scale in XII century, when only strict diatonism was allowed. But we discovered that, curiously enough, both the unusual decoration and the division of the octave in 12 semitones can be referred to diagrams of planetary latitudes, related to musical scales as well, in astronomical manuscripts of the age.

10 :: Planetary latitudes diagrams ::

Such diagrams were intended to represent planetary latitudes across the zodiacal band, divided vertically in 12 degrees. As usual the horizontal line of these grids was divided in 30 parts, but since XI century we often find 12 in order to signify the 12 zodiacal signs. The Sun and Saturn were given a serpentine path within the two middle degrees of the zodiac, Jupiter had three degrees, Mars four, Mercury eight, the Moon covered the zodiacal band with its 12 degrees of latitude. Venus was assigned a latitude of 14 degrees, one degree beyond the zodiac on each side.

11 :: Planetary latitudes diagrams ::

TCmanuscript

Then, in a manuscript by Abbo de Fleury (c 940-1004) we find a horizontal column list of the Plinian intervals between planetary orbits attached to planetary latitudes grid[4]. Whether 14 semitones can be counted in total, the musical octave spanning from Moon to tha Stars is divided into 12 semitones (semitone being the unit of measurement of the scale, clearly enough).Thus, our XII century chromatic scale shouldn’t be considered as a scandal any longer! Besides, experimenting with our special keyboard with keys ranging about two full chromatic octaves demonstrates that this arrangement fits quite well XII century two voices polyphonic music.

12 :: The name

For these reasons we feel the name of Symphonia or Symphonia magna or Symphonia caelestis would be more appropriate for this instrument than the usual, uncertain and rather mocking name of Organistrum.

Its representationin Santiago could have been an exclusive message for a restricted group of scholars capable of understanding the cosmological and musical implications of a non-traditional object that had been invented of course by monks  trained in the liberal arts of Quadrivium.

 

[1]Bruce S. Eastwood.Ordering the Heavens. Roman astronomy and cosmology in the Carolingian renaissance. Brill, 2007   Reasoning about circular and rectilinear motions in: Guglielmo di Conches, Glosae super Platonem. See: Martello Concetto,Platone a Chartres. Palermo, Officina di studi Medievali, 2011, p.86.

[2]Stephen C. McCluskey.Astronomies and cultures in early medieval Europe.Cambridge University Press, 1998, p 97-113.

[3]Giulia Marrucchi e Riccardo Belcari, La grande storia dell’arte. Il Medioevo. Firenze, E-ducationS.p.A., 2005, p 146-7

[4]Bruce S. Eastwood.,Astronomy in Christian latin Europe c.500-c.1150.

in JHA, xxviii (1997) Science History Publications Ltd. p 250-3

VIDEOS:

https://www.youtube.com/watch?v=nrZsIOIWK-o  Diatonic keyboard

https://www.youtube.com/watch?v=UpZP62BPVGY   Chromatic keyboard

BOOKS:

http://www.tipheret.org/product/organistrum/?fbclid=IwAR1pCpvrZoeboCslNiv2n2ZuWeoTJfQwI34C2Kuo8Px8J-QJn_AiPS9KH8A 

 

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Vielle ovale de Graville

Vielle ovale de Graville

Reconstitution d’une vièle ovale d’après une sculpture du 12ème siècle de l’Abbaye de Graville au Havre, Normandie.

La sculpture :
La petite sculpture (30x35x20cm) en pierre blanche, abîmée à gauche, a été retrouvée, après la guerre, dans les ruines de la tour centrale. On ne connaît pas sa position initiale et on pense qu'elle est de la fin du 11ème siècle.Toute la composition et même l'instrument sont inspirés par la forme ovale.La figure entière est inscrite dans un ovale, la tête, les yeux, la bouche ovale, l'instrument a une caisse ovale, l'une des ouïes est une demi-lune et l'autre a une forme presque ovale.La figure est très bien modelée, les traits fins, gracieux, on dirait qu'elle a quelque chose de féminin et de lunaire.
La reconstitution de l'instrument
Les bois :J'ai choisi deux qualités de bois qu'on pourrait aisément retrouver en Normandie au11ème siècle: sapin et hêtre.Sapin (très vieux et avec des taches pour rappeler la surface de la lune) pour le corps de l'instrument: table d'harmonie, éclisses, manche et chevilles. Hêtre pour le fond.
Un instrument creux :
Puisque les instruments au Moyen Âge n'avaient pas d'âme, la résonnance est premièrement due à la table d'harmonie, le fond ayant pour fonction de refléter le son.J'ai donc creusé l'instrument dans du sapin à partir de la table d'harmonie car c’est la partie la plus importante de la vièle, d’une épaisseur d’environ trois millimètres, sans aucun barrage.Le manche est creusé dans la même planche, même s’il est un peu plus haut que la table.Les flancs son concaves. Le fond en hêtre est creusé, arrondi à l'intérieur comme à l'extérieur, l'épaisseur est d’à peu près trois millimètres.
Les ouïes :
Dans la sculpture, on voit que les deux ouïes ne sont pas symétriques, l’une en forme de demi-lune, l'autre presque rectangulaire, creusée plus bas sur l'autre moitié de la table. On pourrait penser que l'auteur a voulu faire ce perçage bizarre pour une raison de perspective, mais j'ai pensé qu'il a reproduit un instrument réel, fait de cette façon.Y-a-t-il d’autres exemples de cette asymétrie sur les vièles médiévales ? NON.Mais il y a d'autres instruments de musique avec des perçages asymétriques, certaines harpes, des psaltérions et des monocordes.
Quelle pourrait être la motivation de cette asymétrie ?Donner au musicien une ouïe (plus petite) plus proche de son oreille ou, proposition presque hérétique, pour placer une âme au-dessous du chevalet ...Après réflexion, j'ai décidé de faire les deux ouïes exactement comme elles sont représentées sur la sculpture.
La touche, le cheviller, le cordier :
La touche est un petit morceau de buis de 2mm d'épaisseur, collé sur le manche.Le cheviller est hexagonal, comme dans les vièles de Boscherville. Le cordier est en buis.
Le vernis :
Je n’ai employé aucun vernis. On sait qu’à l'époque il n'y avait pas de gomme-laque, aussi, pour protéger le bois, j'ai employé de l'huile d'amande pure.
Les cordes :
Les cordes sont en boyau de mouton. J'ai choisi de faire un accord complexe avec deux chœurs et un bourdon. Les chœurs sont accordés à l'unisson ou en quintes.


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