The Sounds of Silence

In the 17thand 18thcenturies, the most famous luthiers of all time worked in Cremona, Italy.  The names Amati, Guarneri, and especially Stradivari connote excellence in instrument making and the pinnacle of sound production.  But how Antonio Stradivari and the other luthiers of the period created these instruments of such extraordinary sound is an enduring mystery. For hundreds of years, scientists have been trying to discover the secrets behind their craftsmanship. Researchers studied everything from the types of wood used, to the impact of weather at the time on the wood, to the chemicals used to protect the instruments against woodworm, to the role of the decorations on the sound production.  The theories are interesting but inconclusive (see post, “The Mystery of Stradivari,” July 21, 2016).

Today Cremona is home to the Museum of the Violin, which houses some of the finest stringed instruments created by the masters.  They are carefully preserved in glass cases—seen but not touched.  In January 2019, they came out of their cases and were played by carefully selected musicians as part of an extraordinary project to preserve the sound of the world’s best stringed instruments.  Called the “Stradivarius Sound Bank,” this project is designed to capture the tones created by instruments selected from the Museum of the Violin’s collection.  According to the museum’s curator, Fausto Cacciatori, each Stradivarius has “its own personality.”  But their distinctive sounds will inevitably change and could be lost within just a few decades.  “It’s part of their life cycle,” he added.  “We preserve and restore them, but after they reach a certain age, they become too fragile to be played and they ‘go to sleep,’ so to speak.”

Here is how the Stradivarius Sound Bank was conceived and is being conducted (as reported in Italian publications and the New York Times) … with some surprises along the way.  Three sound engineers wanted to create a database of all the possible sounds that stringed Stradivarius instruments can produce. Not only would this enable future generations to hear these instruments, but the database would be able to be manipulated in order to produce new recordings when the tone of the original instruments degraded.  Musicians of the future would also be able to record a sonata with an instrument that no longer functions.  This would be a way to make the finest instruments ever crafted become immortal.

Thomas Koritke, one of the sound engineers who is from Hamburg, Germany, and who is leading the project, said that organizing it has taken a long time.  First, “it took us a few years to convince the museum to let us use 500-year-old stringed instruments,” he said.  Then they had to find top musicians who knew the instruments inside out.  Then, the acoustics of the auditorium in the museum where they would play were studied. Thirty-two ultrasensitive microphones were set up in the auditorium to capture the sounds from the 4 instruments selected (2 violins, a viola, and a cello).  In 2017, the engineers thought that the project was finally ready to begin. But a soundcheck revealed a major problem.

As in many Italian cities, the streets of Cremona around the museum are made of cobblestone.  The sound of car engines, a woman walking in stilettos, the voices at bars and restaurants produced vibrations that ran underground and reverberated in the microphones.  Either the project — or the town — had to be shut down.  Luckily for the visionary engineers, Cremona’s mayor, Gianluca Galimberti, is also the president of the Stradivarius Foundation, the municipal body that owns the museum.  On January 7 the streets around the museum were closed for five weeks. The streets in the busy city center were cordoned off and traffic was diverted.  At a news conference, Galimberti implored the citizens to avoid any noise.  Even those who lived in apartments near the piazza of the museum were asked to walk barefoot and to refrain from banging dishes and pans in the kitchen.  Sudden unexpected noise could even generate a visit from the local police.  Within the museum’s auditorium, the ventilation and elevator systems were turned off.  Every light bulb in the concert hall was unscrewed to eliminate a faint buzzing sound.

In the ensuing silence throughout January and beyond, the four musicians played hundreds of scales and arpeggios, using different techniques with their bows, or plucking the strings of the famous instruments.  According to Koritke, it is both physically and mentally challenging. They have to play hundreds of thousands of individual notes and transitions for eight hours a day, six days a week, for more than a month.  The payoff for future generations should be staggering.

Ironically, silence is not a new phenomenon for the city of Cremona.  During the Renaissance, a convent stood on the current site of the Museum of the Violin.  Also during the Renaissance, the area around Piazza Marconi in Cremona was called the Island of Silence because it was populated by weavers of linen and wool and other fabrics.  The citizens then, however, did not have to walk on tiptoe.

 

 

 

 

 

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Il mistero della lettera di Galileo

Galileo modificò la sua lettera a Castrelli per moderare le sue opinioni sulla chiesa e la sua visione “eretica” eliocentrica dell’universo? O qualcuno inviò una falsa lettera all’Inquisizione contro lo scienziato? O la chiesa modificò la sua lettera per provare la sua colpevolezza durante l’Inquisizione? In altre parole, Galileo stava facendo “controllo del danno” (nel linguaggio di oggi) o, come sosteneva Galileo, era questa “falsa notizia” concepita dai suoi nemici a causa di “cattiveria e ignoranza”?

Una nuova copia della lettera di Galileo è venuta alla luce per risolvere questo mistero. La lettera è stata scoperta nell’agosto 2018 a Londra nella biblioteca della Royal Society. Un giovane ricercatore bergamasco, Salvatore Ricciardo, alla fine della giornata stava sfogliando un catalogo e l’ha scoperta per caso. Era stata datata erroneamente e quindi era stata “persa” per più di 250 anni. L’origine della lettera è stata verificata.

Iniziamo con un contesto storico e una cronologia degli eventi. Fu nel 1543 che l’astronomo polacco Nicolao Copernico pubblicò un libro in cui proponeva che la terra non fosse al centro dell’universo ma che i pianeti orbitassero attorno al sole. Nel 1600 l’Inquisizione a Roma condannò un frate e matematico domenicano, Giordano Bruno, di eresia per aver supportato, oltre ad altre case, il modello copernicano. Bruno fu bruciato sul rogo. Poi nel 1610 Galileo pubblicò un libro basato sulle sue scoperte con il suo nuovo telescopio che supportava la tesi copernicana.

Poi nel 1613 Galileo scrisse una lettera all’amico Benedetto Castelli, un matematico dell’Università di Pisa. Nella missiva di 7 pagine firmata “GG”, Galileo non solo sosteneva che i pianeti ruotassero attorno al sole, ma sosteneva anche per la prima volta che la ricerca scientifica dovesse essere liberata dalla dottrina teologica. Furono fatte circolare copie della lettera.

E ora inizia il putiferio. Il frate domenicano Niccolò Lorini inviò la lettera di Galileo all’Inquisizione a Roma nel 1615. (Una copia di questa lettera è conservata nell’Archivio dei Segreti Vaticani). Una settimana dopo Galileo scrisse al suo amico Piero Dini, suggerendo che la versione inviata da Lorini era stata alterata.  Allegò una versione meno urgente della lettera originariamente inviata a Castrelli, presentandola come la versione originale, e gli chiese di portarla ai teologi vaticani. Nei successivi 15 anni, nonostante gli avvertimenti della chiesa, Galileo continuò a esprimere le sue opinioni sul Sistema Solare.

Poi nel 1632 l’Inquisizione convocò Galileo a Roma per essere processato. La lettera Lorini fu usata come prova per condannare Galileo di “veemente sospetto di eresia”. Fu condannato a una pena detentiva, che fu poi commutata agli arresti domiciliari, in base ai quali visse gli ultimi nove anni della sua vita.

Allora, cosa mostra la lettera appena scoperta? Sotto gli emendamenti di proprietà di Galileo, la copia firmata scoperta da Ricciardo a Londra è la stessa copia di Lorini. Galileo la modificò per evitare l’ira dell’Inquisizione. Ma le modifiche sono piuttosto lievi, intese ad ammorbidire le parole più aspre. Ad esempio, Galileo a un certo punto si riferiva a certe affermazioni della Bibbia come “false” ma le sostituiva con “sembra diverso dalla verità”. In un’altra sezione, cambiò il suo riferimento alle Scritture “nascondendo” i suoi dogmi più basilari, a il più morbido “velando”.

Chi può incolpare Galileo per le sue modifiche? In un momento in cui gli eretici venivano bruciati sul rogo, fu fortunato a ricevere gli arresti domiciliari. Per ora, i ricercatori sono stupiti dalla loro scoperta. L’importanza della lettera di Galileo a Castrelli non può essere sopravvalutata. È uno dei primi manifesti secolari a richiedere la libertà della scienza dall’interferenza religiosa.

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The Mystery of Galileo’s Letter

Did Galileo edit his letter to Castrelli to moderate his views on the church and his “heretical” heliocentric view of the universe?  Or did someone send a false letter to the Inquisition against the scientist?  Or did the church amend his letter to prove his guilt during the Inquisition?  In other words, was Galileo doing “damage control” (in today’s parlance) or, as Galileo maintained, was this “fake news” conceived by his enemies out of “wickedness and ignorance”?

A new copy of Galileo’s letter has come to light solving this mystery.  The letter was discovered in August 2018 in London at the library of the Royal Society.  A young researcher from Bergamo, Salvatore Ricciardo, at day’s end was leafing through a catalogue and stumbled upon it.  It had been incorrectly dated and therefore had been “lost” for more than 250 years.  The origin of the letter has been verified.

Let’s start with a little background and a timeline.  It was in 1543 that the Polish astronomer Nicolaus Copernicus published a book in which he proposed that the earth was not the center of the universe but that the planets orbit the sun.  In 1600 the Inquisition in Rome convicted a Dominican friar and mathematician, Giordano Bruno, of heresy for, among other counts, supporting the Copernican model. Bruno was burned at the stake. Then in 1610 Galileo published a book based on his discoveries with his new telescope that supported the Copernican thesis.

Then in 1613 Galileo wrote a letter to his friend Benedetto Castelli, a mathematician at the University of Pisa.  In the 7-page missive signed “GG,” Galileo not only maintained that the planets revolved around the sun, but also claimed for the first time that scientific research must be free from theological doctrine.  Copies of the letter were circulated.

And now the ruckus begins. Dominican friar Niccolò Lorini sent Galileo’s letter to the Inquisition in Rome in 1615.  (A copy of this letter is kept in the Vatican Secrets Archives.) A week later Galileo wrote to his friend Piero Dini, suggesting that the version sent by Lorini had been altered. He attached a less inflammatory version of the letter originally sent to Castrelli, presenting it as the original version, and asked him to get it to the Vatican theologians.  Over the next 15 years, despite warnings from the church, Galileo continued to put forth his views of the Solar System.

Then in 1632 the Inquisition summoned Galileo to Rome to stand trial.  The Lorini letter was used as evidence to convict Galileo of “vehement suspicion of heresy.”  He was given a prison sentence, which was later commuted to house arrest, under which he lived the last nine years of his life.

So what does the newly discovered letter show?  Underneath the amendments in Galileo’s hand, the signed copy discovered by Ricciardo in London is the same as the Lorini copy.  Galileo made the changes to avoid the wrath of the Inquisition.  But the changes are rather minor, meant to soften harsher words.  For example, Galileo at one point referred to certain statements in the Bible as “false” but replaced it with “appears different from the truth.”  In another section, he changed his reference to the Scriptures “concealing” its most basic dogmas, to the softer “veiling.”

Who can blame Galileo for his edits?  At a time when heretics were burned at the stake, he was lucky to receive house arrest.  For now, researchers are amazed by their discovery.  The importance of Galileo’s letter to Castrelli cannot be overestimated.  It is one of the first secular manifestos to call for the freedom of science from religious interference.

 

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