Thank you rcprince and frogman. You have explained why the so-called 'scientific' test was probably not, in fact, scientific.
Science is a method of knowing, and it requires not only a knowledge of scientific practice, but of the subject matter (in this case, violins and violinists and institutional owners of violins).
And just like this research appears to be pseudo-science, the OP refers to another pet peeve, digital audio, which is often justified with pseudo-mathematics. For example, to see that the Shannon Information Theorem does not actually apply to digital media, one has only to read that theorem. (Hint: inspect the premises.)