Here at Second Disc HQ, we’re eagerly anticipating April 21, or Record Store Day, the industry-wide celebration of all things vinyl (and a few CDs, too!).  Record Store Day, now in its fifth year, gives shoppers the chance to interact with big crowds of fellow music enthusiasts in the brick-and-mortar retail environment cherished by so many of us.  Legacy Recordings has announced its impressive line-up of limited edition releases that will line the shelves of your favorite independent music store on that Saturday, including titles from the 2012 Record Store Day Ambassador,…