Haha. That’s great that we can decode it in software.I know DolbyA decoding, I have developed software that can decode DolbyA pretty well, and it is DEFINITELY BEST TO AVOID!!! I hope no-one ever uses DolbyA to write a tape again. It can be a headache for anyone trying to read it. Note that I didn't write a DolbyA encoder -- actually a little easier?
It was great for its day, esp using the same tape deck/DolbyA unit combination all of the time. Mix and match? not so much.
DolbyA noise reduction IS very good, but does leave some 'fog'. Who really cares anymore?
They really threw a hammer at the problem.
It will drive the nail in and who cares if the wood finish gets damaged?