Larry Kayser wrote:

>Modern sound cards have superb A/D converters,
>so why not use them ?

Computer sound cards did not exist when Bill started his work, since they
were not available they were not used.  Having been around A/D converters
for many years, the superlative of "superb A/D converters" seems to have a
degree of hyperbole from my perspective.

'Superb' in this context refers of course to the adequateness (sp?) to the task.
Having 16 bits of resolutions, and, for the best cards, a noise floor 
approaching
-90 dB, seems to be much more than adequate for whatever radio-received
audio-range signals one could need to process. For hi-fi applications, this 
doesn't
hold any more, of course.

In the interim he has done DSP work that is superb for weak signal work and
has been demonstrated to perform excellently.

Yes, his work is excellent, and if/when he will port it to a sound card, it 
will surely be
a winner also in terms of number of users.

73
Alberto    I2PHD