You know how sometimes a song or a tune gets stuck in your head and you can't get it out and instead you end up listening to the darn thing over and over again and each time only whets your appetite further?
My tune of the day / week / month (god, I hope not!) is As Time Goes By, performed by Stephane Grappelli, Live in Tokyo.
Go on, Sam. You know what to do.
(which is, of course, just a sigh)