I have written on the subject of music before. The great joy of being the blog author is that I can write about it again. If you wish I would write about something then, by all means, send an email and tell me what you'd like me to write about. Or email Gretch and tell her you'd like to see her contribute to the blog in ways other than posting her amazing comic. But, as usual, I digress. In preparing for this blog post (yes, that's right, I actually prepared for this, rather than simply writing off-the-cuff as I so often do), I was searching for quotations about music. I stumbled upon the one used in the post title, by Guiseppe Mazzini, and realised it was the perfect title for my subject. "Music is the harmonious voice of creation, an echo of the invisible world." Of the many wonderful things about music, one of the ones that I cherish the most is the vast multitude of expressions of music. As I am sitting here typing, my wife is in one room listening to music be...