Sometimes it's nice to get away from the ever-running stream of pop music to which I listen. On Saturday night, my wife and I went to see the Minnesota Orchestra put on a trio of pieces by Russian composers. I've long been a fan of everything Stravinsky, so I was expecting his brief Symphony of Wind Instruments to be the center of the evening. Instead, I was bowled over and left weak-kneed by the performance of Shostakovich's Concerto in A Minor for Violin and Orchestra. The violinist was absolutely dead-on in key with Shostakovich's wintry hesitation and seemed to fall with the weight of gravity into the piece's more frenzied moments. Easily the centerpiece of the evening, I had to rush out and buy his Fifth Symphony the next day. Now, the week has started, and I'm back to my Tom Waits at the office. But Shostakovich proved such a well-tailored companion for a wintry Saturday eve. . .