Sigh No More, the latest album from Mumford and Sons, is a rousing chorus of bluegrass harmonies, Shakespearean wordplays, and lyrics of heartache and joy. The British band performs indie rock that is not only well-crafted, but contagious—the songs’ melodies remain with you, along with their hopeful lyrics: “Love it will not betray you, dismay or enslave you/It will set you free.” Listeners should be warned that one song contains offensive language. (Glass Note)