Back in early May we told you guys to join a beta for an app called Sleeve Music. A sleeve note (also known as a linear note or album note) are those pieces of paper you found with your vinyl records and CD cases back in the day. On them you’d find things like biographies, info about the album in your hand, and much more. These days we don’t really have an equivalent. Sure iTunes offers a “digital booklet” with some albums, but you’re probably not on iTunes and Sleeve Music for Windows Phone is so much more than that. Let’s check it out.