OK, so I played trombone in high school. It was never this easy!
If you are looking for an iPhone application to make you sound as good as Louis Armstrong or Glenn Miller, check out iBone. You don;t even have to be in New Orleans; play it like a pro in Salt Lake City, Utah; Boise, Idaho; even Corvallis, Montana! It will have you playing the trombone on your iPhone in no time at all!