Whether it's a song by Brahms or by the Boss, a serenade by Mozart or a ballet by John Harbison, music radiates a diverse spectrum of meaningful signs, hidden in plain hearing. To enjoy the interplay of musical signs, it helps to recognize them in the first place. The various iconographic strategies of Audible Signs-including commentary on graphic works, books, poems, and film-yield new appreciations and critiques of composers of vastly divergent...