At the end of 2008, I was looking for a version of Arcangelo Corelli’s Follia to listen to with my eyes. I heard a large number of versions, many beautiful ones, some by very famous musicians (rightly so), but the one version that really grabbed my attention was by an ensemble I had never heard of, “Quadro Janas”. I found them through an amazing Dutch website dedicated to as many versions of foli…