Opera and rap take work to appreciate — perhaps more effort than many of today’s music consumers are willing to expend. In an age when more and more music is available to anyone’s ears, are we turning into lazy listeners? Is it too easy to download too much, to acquire everything but actually hear nothing? Does any time remain to fully appreciate a complete hip-hop album, let alone an entire opera? It also takes work to enjoy music that’s as in-your-face as opera and rap are. With all the melodrama, social consciousness, violence and intense vocal styles, they certainly are not musical wallpaper.