Why were they called Diamond Discs? Because unlike the conventional discs of the day which were played with a steel stylus, Edison discs needed to be played with a special diamond stylus which didn't wear out or wear the record surface. he totally reconfigured the tone arm and used a recording process known as "hill and dale" rather than the lateral cut surface Victor, Columbia, Brunswick, and the other disc manufacturers used. Their records wore out quickly, his did not.
But here is the amazing thing. The process Edison developed caused a noticeably greater sense of depth and reality to the music he recorded. The discs recorded by the opera singers of the day are generally remarkable, because the process he used was essentially a stereophonic process! The amazing vibrancy of most of his discs is amazing and comparing his recordings of singers like Muzio, Bori, Zenatello, Bonci, and many many more to their lateral cut discs for Victor and Columbia is startling.
Future releases in our Heritage Series will include many of his best Diamond Disc recordings. Below is an example of an Edison Diamond Disc by the legendary Claudia Muzio.