A Stradivarius is one of the violins, violas, cellos and other string instruments built by members of the Italian family Stradivari, particularly Antonio Stradivari (Latin: Antonius Stradivarius), during the 17th and 18th centuries. According to their reputation, the quality of their sound has defied attempts to explain or equal it, though this belief is disputed. The fame of Stradivarius instruments is widespread, appearing in numerous works of fiction.
Comparisons in sound quality
Above all, these instruments are famous for the quality of sound they produce. However, the many blind experiments from 1817 to the present (as of 2014) have never found any difference in sound between Stradivari's violins and high-quality violins in comparable style of other makers and periods, nor has acoustic analysis. In a particularly famous test on a BBC Radio 3 programme in 1977, the violinists Isaac Stern and Pinchas Zukerman and the violin expert and dealer Charles Beare tried to distinguish between the "Chaconne" Stradivarius, a 1739 Guarneri del Gesú, an 1846 Vuillaume, and a 1976 British violin played behind a screen by a professional soloist. The two violinists were allowed to play all the instruments first. None of the listeners identified more than two of the four instruments. Two of the listeners identified the 20th-century violin as the Stradivarius. Violinists and others have criticized these tests on various grounds such as that they are not double-blind (in most cases), the judges are often not experts, and the sounds of violins are hard to evaluate objectively and reproducibly.
In a test in 2009, the British violinist Matthew Trusler played his 1711 Stradivarius, said to be worth two million U.S. dollars, and four modern violins made by the Swiss violin-maker Michael Rhonheimer. One of Rhonheimer's violins, made with wood that the Empa (Swiss Federal Laboratories for Materials Science and Technology) researcher Francis Schwarze had treated with fungi, received 90 of the 180 votes for the best tone, while the Stradivarius came second with 39 votes. The majority (113) of the listeners misidentified the winning violin as the Stradivarius.
In a double-blind test in 2012 published in the study "Player preferences among new and old violins", expert players could not distinguish old from new instruments by playing them for a short time in a small room. In an additional test, performed in a concert hall, one of the Stradivarius violins placed first, but one of the participants stated that "the audience in the concert hall were essentially equivocal on which instruments were better in each of the pair-wise instrument comparisons" and "I could tell slight differences in the instruments... but overall they were all great. None of them sounded substantially weaker than the others". Modern violins were rated as having better sound-carrying qualities and were preferred again in a study in 2017.
While many world-class soloists play violins by Antonio Stradivari, there are notable exceptions. For example, Christian Tetzlaff formerly played "a quite famous Strad", but switched to a violin made in 2002 by Stefan-Peter Greiner. He states that the listener cannot tell that his instrument is modern, and he regards it as excellent for Bach and better than a Stradivarius for "the big Romantic and 20th-century concertos."
Theories and reproduction attempts
Some maintain that the very best Stradivari have unique superiorities. Various attempts at explaining these supposed qualities have been undertaken, most results being unsuccessful or inconclusive. Over the centuries, numerous theories have been presented – and debunked – including an assertion that the wood was salvaged from old cathedrals.
A more modern theory attributes tree growth during a time of global low temperatures during the Little Ice Age associated with unusually low solar activity of the Maunder Minimum, circa 1645 to 1750, during which cooler temperatures throughout Europe are believed to have caused stunted and slowed tree growth, resulting in unusually dense wood. Further evidence for this "Little Ice Age theory" comes from a simple examination of the dense growth rings in the wood used in Stradivari's instruments. Two researchers – University of Tennessee tree-ring scientist Henri Grissino-Mayer and Lloyd Burckle, a Columbia University climatologist – published their conclusions supporting the theory on increased wood density in the journal Dendrochronologia.
In 2008, researchers from the Leiden University Medical Center in the Netherlands, announced further evidence that wood density caused the claimed high quality of these instruments. After examining the violins with X-rays, the researchers found that these violins all have extremely consistent density, with relatively low variation in the apparent growth patterns of the trees that produced this wood.
Yet another possible explanation is that the wood was sourced from the forests of northern Croatia. This maple wood is known for its extreme density resulting from the slow growth caused by harsh Croatian winters. Croatian wood was traded by Venetian merchants of the era, and is still used today by local luthiers and craftsfolk for musical instruments.
Some research points to wood preservatives used in that day as contributing to the resonant qualities. Joseph Nagyvary reveals that he has always held the belief that there are a wide range of chemicals that will improve the violin's sound. In a 2009 study co-authored with Renald Guillemette and Clifford Spiegelman, Nagyvary obtained shavings from a Stradivarius violin and examined them, and analysis indicated they contained "borax, fluorides, chromium and iron salts." He also found that the wood had decayed a little, to the extent that the filter plates in the pores between the wood's component tracheids had rotted away, perhaps while the wood was stored in or under water in the Venice lagoon before Stradivarius used it.
Steven Sirr, a radiologist, worked with researchers to perform a CT scan of a Stradivari known as the "Betts." Data regarding the differing densities of woods used were then used to create a reproduction instrument.
Violins bearing the Stradivari label
While only about 650 original Stradivari instruments survive (harps, guitars, violas, cellos, violins), thousands of violins have been made in tribute to Stradivari, copying his model and bearing labels that read "Stradivarius" on them. The presence of a Stradivarius label does not confirm that the instrument is a genuine work of Stradivari.
Preserving the Stradivarius sound for future generations
According to a 2019 article in The New York Times, the Museo del Violino in the city of Cremona, Italy is undertaking a landmark project to preserve the sound of Stradivarius instruments. In January 2019, four musicians will record an extensive set of scales and arpeggios in different techniques to showcase the sounds produced by two violins, a viola, and a cello. These recordings, known as the "Stradivarius Sound Bank", will be part of a permanent collection at the Museo del Violino that will allow future generations to hear Stradivarius instruments. To facilitate these recordings, "the city's mayor, Gianluca Galimberti, implored Cremona's citizens to avoid any sudden and unnecessary sounds." ~ wiki
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