I received the enclosed link to a wonderful article by George Shirley, my teacher during my graduate days at the University of Michigan. I have often expressed my profound admiration for this remarkably accomplished man, and thought you might enjoy his balanced and well-thought out article.
I hope you find the article as interesting as I do. You should know that I have replaced my Voce Vista tools and am already engaged in acoustic analysis of the great voices of the past. I will soon have a series, as promised, dealing with the virtues and weaknesses of the great masters based on such analysis.