The fdmdv_mod and fdmdv_demod only work at mode 1300.
c2enc 1300 hts1a.raw - | fdmdv_mod - - | fdmdv_demod - - | c2dec 1300 - -
|play -t raw -r 8000 -e signed-integer -b 16 -
If you play the above, it will have a little warble at the start as it
syncs and then fully decodes. This syncing is probably what throws the RC4
out of wack.
On Fri, May 30, 2014 at 8:43 AM, Andreas Weller <wel...@andreas-weller.de>
wrote:
>
> Adding the modem to the pipe breaks the whole thing - so IMHO the modem
> is unfortunately not fully bit transparent:
>
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