Re: [Freetel-codec2] 700D mode on SM1000

[Steve <cou...@gm...>]

On Thu, Sep 6, 2018 at 2:10 PM Don <don...@db...> wrote:
>
> Can anyone tell us what was changed around the input such that the
> older SM1000 ADC code wouldn't still work for getting data in?
>
The old modem used 320 byte codec frames, with I believe 4 times that
for buffer space.
700D send 4 codec frames per modem frame, so buffering that amount 4
times is a healthy chunk of ram for both A/D and D/A.

I believe the ARDOP boys pushed the buffering part up into the higher
ring, so that interrupt level timing wasn't a problem.