Most important, HD digital files would concern only a very small group of people (amongst an already very small group of people listening to film music), because one would need a very special audio card on their computer and maybe a DAC to fully enjoy the high definition of the files. And to have your computer not far from your audio-video system in the living room, which is not easy for everyone While all the HD discs like DVD Audio/Video, HDAD or Blu-ray Audio would only need a DVD player or a Blu-ray player, which everyone has nowadays.
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