In 1907, executives from the Gramophone Company headed to the basement of the Paris Opera and sealed up some wax recordings of famous opera singers. Now, a century later, these recordings have been opened, dusted off, and (yes) even commercialized. Later this month, EMI will release the recordings under the title, “Treasures From the Paris Opera Vaults.” If you click on this NYTimes article and scroll down a little to the Multimedia section, you can sample these century old recordings. The Times collection features outtakes from Verdi’s Aida, Otello and Rigoletto. Find them here.