I was thinking about using the analog to digital converter on
a PIC1671 to sample audio at a rate of 8,000 samples per second.  I
was going to use a clock frequency around 20 MHZ.

        The data sheet appears to show, however, that each sample
takes a second or so to develop so this would rule out that
converter.  I just want to be sure I am not mistaken, however.  I know
that the A/D converter on a Motorola 68HC11 is a
successive-approximation type that can take a sample in 15 or so usec
which is plenty good for 8-KHZ audio samples.  I would be using the
20-meg clock and not the RC internal oscillator for the A/D
converter.