Just to save others time researching; The article says this:

"Nevertheless, Takayama and Suzukawa toiled to build Sony's first PCM digital audio recording machine, the X-12DTC, was announced in 1974. It used 2-inch wide tape and a fixed head with 56 channels. Although it reproduced sound, the X-12DTC recorder was roughly the size of a refrigerator. The transport unit alone weighed approximately 250 kilograms. Although overly bulky, the creation of the first machine marked the beginning of Sony's history in digital sound recording. The machine was transported to and from various venues to make test recordings of orchestral music. The recorder was also exhibited at the 1974 Audio Fair in Japan. Some audio specialists remarked on the clarity of the machine's sound. In the end, however, the recorder was not marketed, even though producing digital sound through a PCM system with fixed heads represented a revolution in recording technology."

and Betamax is not describer further in the article. So there was a 2" digital recorder prototype, but it was not a Betamax... was it? Kind of like having an 18 wheeler Chevy; I never saw one!

If one were looking for that specific CD how would one ID it - does it have a label number? Sounds interesting.
Lou Judson
Intuitive Audio

On Aug 7, 2012, at 2:03 PM, David Lewis wrote:

> Is it possible that digital was somewhere in the chain of "Cheap Trick at
> Budokan." Historically it is possible:
> The PCM-1 was in use and already being marketed by April of 1978 when
> the Budokan concerts were recorded. At that time, Sony was using 2" Betamax
> tapes;
> the disc was being developed, but was not putting out acceptable results
> yet as either a recording or playback format. However, April 1978 is a bit
> before the
> fateful meeting with Karajan mentioned in this corporate history.