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From: agn@cmu-cs-k.ARPA (Andreas Nowatzyk)
Newsgroups: net.audio
Subject: Digial audio info wanted
Message-ID: <235@cmu-cs-k.ARPA>
Date: Sat, 26-Jan-85 03:25:03 EST
Article-I.D.: cmu-cs-k.235
Posted: Sat Jan 26 03:25:03 1985
Date-Received: Tue, 29-Jan-85 07:20:37 EST
Organization: Carnegie-Mellon University, CS/RI
Lines: 23

Is there any standart for *digital* audio interconnections?
It seems that CD players, PCM audio systems and possibly other
digital audio-equipment (say a digital equilizer) will need digital
interconnections, defering the D-to-A conversion to the last point in
the chain (this could be an active Box with one DAC/filter/power-amp
for each speaker system, where the band-splitting and individual
equilization is done digitally -- think VLSI).

To be more precise:
  1) Is there a CD-player available that has a connector on the back
     that gives the stream of 16bit-words after the error-correction
     logic and before any filter/over-sample operation?
  2) Is there a PCM encoder that accepts 16bit-words instead of an
     analog input?
  3) Are there other digital audio-sources in use or planned (such as
     synthesizer, microphones [there are methods for precise
     analog-air-pressure to digital-electrical signal], etc) ?

Please send mail to:      agn@cmu-cs-k.ARPA
                 or:      ...!seismo!cmu-cs-k!agn

   Thanks  --  Andreas