[hpsdr] Would the real DttSP please stand up?

[Warren C. Pratt]

Hi Larry,

We have generally moved away from DttSP.  From your list below, it looks 
like the latest version we used in PowerSDR was:

W5WC/PowerSDR_HPSDR_mRX/Source/DttSP         321d 19h   3049

That sounds about right as I recall.

As far as I know, Flex still uses DttSP in their version of PowerSDR.  
Our openHPSDR evolution was to first re-write parts of that version and 
then later, as I mentioned, move on to  a newly developed library, "wdsp".

With regard to your DttSP questions:  I believe that DttSP was written 
with the goal of being computer architecture and OS INdependent.  The 
version in PowerSDR has a fairly substantial interface piece that is 
more or less tied to the software architecture of PowerSDR.  The good 
news is that there's an interface there and it can be used in other 
applications; the bad news is that it limits the flexibility of the 
underlying library.

I believe that there must be several users of DttSP out there. openHPSDR 
has not made any effort to share fixes and improvements or participate 
in a general DttSP repository, at least for quite some time.  All the 
changes we made are, of course, open source and available to anyone to 
use subject to the terms of the GNU GPL v2 license.

73,
Warren  NR0V

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