Article View: sci.electronics
Article #1058Re: RS-232 for voice
From: Pete French
Date: Wed, 02 Aug 1989 07:50
Date: Wed, 02 Aug 1989 07:50
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From article <8840@attctc.Dallas.TX.US>, by sampson@attctc.Dallas.TX.US (Steve Sampson): > > You can forget all about the amplitude! Just pass the sign bit and it sounds > great. (Pulse Width Modulation). ... UGH! I wouldnt say it sounds 'great'. You are performing the equivalent of clipping the signal by turning up our amp to infinite volume. It is, however, just aacceptable and so could be used. I remember constructing a system to send audio digitally on a test bench and then unplugging the bits one-by-one to see what the decrease in quality was. We were playing a Suzzanne Vega tape through it and it was still recognisable, even listenable, at one bit. I would hesitate to say that this is "Pulse width modulation" though - that is something rather different. -Pete French.
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arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!usc!cs.utexas.edu!uunet!mcvax!ukc!axion!galadriel!pcfReferences:
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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!usc!cs.utexas.edu!uunet!mcvax!ukc!axion!galadriel!pcf From: pcf@galadriel.bt.co.uk (Pete French) Newsgroups: sci.electronics Subject: Re: RS-232 for voice Message-ID: <302@galadriel.bt.co.uk> Date: 2 Aug 89 07:50:19 GMT References: <8840@attctc.Dallas.TX.US> Organization: RT6115, BTRL, Martlesham Heath, England Lines: 17