In response to Musicman, I scoured every nook and cranny of Sheet Music and found nothing. And, alas! Midisoft, the company that makes Sheet Music just went out of business (I couldn't reach them by any method). It's a shame - I have gotten a lot of mileage out of the program.

To Bill, I think you misunderstood what I'm looking for. I'm looking for a way to raise slightly the pitch of the music notes that are produced by the Sheet Music program in my computer, i.e. to raise it to A440 exactly. I'm not looking for a tuner. Thanks anyway to you both for trying.