But wait a minute: What's that organ drone in "Heart Attack"? It's actually a Mellotron, an old keyboard that was the signature of British prog-rock groups like The Moody Blues and King Crimson. There ...

It's trite and a little obvious to say that there's a feeling of sadness in the air. Between the recent and untimely deaths of musicians -- particularly the sense that there's been a disproportionate ...