The next step, says Mr Wohlers, is to cut out the casting process and print the plate directly.

ECONOMIST: MONITOR

Although the process of transferring a musical composition from a gleam in the composer's eye into a handwritten manuscript and, finally, a performance-ready score has come a long way from the days of copper-plate engraving, it's a process rife with the possibility of transmittal error.

WSJ: Ravel| Mother Goose| New York Philharmonic| Arbie Orenstein