Vinyl works the same way it does now, except you will be able to specify the size either in terms of speed (33, 45, 78) or actual size (12", 7", 10"). This nets you a big square piece of art, much as when you change the format of a CD to "Vinyl" in the current version. If you have a record with two different bands, you can just use option-enter in the artist field to add the second band name, or you can create two records, noting somewhere that they are actually the same physical record. There's no built-in support for that situation, though.