In an invitation sent out today, Apple announced that it will be holding a special event in San Francisco on Monday, April 28, 2003. The invitation was not specific on what the company would announce at the event, but it did say that Apple will have “announcements that will be music to your ears,” according to MacCentral. As you may recall, recent speculation has centered around Apple’s plans to launch a digital music service, reports that the company will acquire Universal Music, as well as rumored iPod updates.