Re: If my wav file worked then..

From	Duncan Snowden <duncan_s@talktalk.net>
Newsgroups	comp.sys.sinclair
Subject	Re: If my wav file worked then..
Date	2012-10-02 13:52 +0100
Organization	Aioe.org NNTP Server
Message-ID	<20121002135231.645ef369@talktalk.net> (permalink)
References	<k466uj$n7q$1@dont-email.me> <6tvd689i0o36flecalr59fale00d6e1bhi@4ax.com> <k48su1$3mb$1@dont-email.me> <k4994h$brm$2@matrix.darkstorm.co.uk> <71kl68hoq037te30kbk6otf450rs3umdue@4ax.com>

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On Tue, 02 Oct 2012 12:51:16 +0100
Johny B Good <johnny-b-good@invalid.ntlworld.com> wrote:

>  It's worth remembering that you're not recording a signal with the
> complex waveforms normally associated with musical instruments, just a
> mix of two or three frequencies up to their third harmonic to allow
> the zero transition timings to be reproduced with sufficient accuracy
> for the digital data stream thus encoded to be regenerated without
> error.

[snip]

>  You won't believe how difficult it can be to get an analogue tape
> recorder to capture the zero crossing points of a 'simple' sinewave
> being 'switched' between two frequencies with sufficient accuracy to
> enable retrieval of the encoded data. Even a simple mp3 recorder can
> manage a far better job in this respect.

Exactly what I was thinking: lossy compression can actually give you a
*better* save because it simplifies the signal. Nice to have it
confirmed by someone who knows what he's talking about, though.

-- 
Duncan Snowden.

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Thread

If my wav file worked then.. "Brian Gaff" <Briang1@blueyonder.co.uk> - 2012-09-29 08:11 +0100
  Re: If my wav file worked then.. Volker Bartheld <dr_versaeg@freenet.de> - 2012-09-29 11:43 +0200
    Re: If my wav file worked then.. "Brian Gaff" <Briang1@blueyonder.co.uk> - 2012-09-29 11:36 +0100
  Re: If my wav file worked then.. Johny B Good <johnny-b-good@invalid.ntlworld.com> - 2012-09-29 15:05 +0100
    Re: If my wav file worked then.. "Brian Gaff" <Briang1@blueyonder.co.uk> - 2012-09-30 08:38 +0100
      Re: If my wav file worked then.. Tony <tony@darkstorm.invalid> - 2012-09-30 12:07 +0100
        Re: If my wav file worked then.. Johny B Good <johnny-b-good@invalid.ntlworld.com> - 2012-10-02 12:51 +0100
          Re: If my wav file worked then.. Duncan Snowden <duncan_s@talktalk.net> - 2012-10-02 13:52 +0100

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