Compiling a pocket dictionary of musical terms at the turn into the 21st century is a bit like engaging in time travel - the compiler, like the reader in turn, moves through literally centuries of terms, each with its own relevance and use: slam dancing and classical ballet, heterophony and time-brackets, coloratura and circular breathing, crumhorns and synthesizers. The reader is struck by the virtual panoply of musical worlds, and by the specialized...