Bob Ludwig first worked with a digital recording in 1978. Telarc Records brought a Soundstream machine to Masterdisk, and he cut one of their early classical recordings. From that time forward, Ludwig worked with almost every format and key piece of equipment in digital sound's evolution.
"Soundstream and the 3M Digital system sounded good, early on," he said, but then the Compact Disc was launched, and Sony came to rule the digital roost. "When I was starting out with digital mastering, we had the first Sony systems that were going to be used for CD production. ... I remember…