Hi Jinx,

So far only Peter and I have touched on the basics of the issue here -
that you absolutely must not introduce signal to the A/D converter above
half the sample frequency.

All A/D converters must (by international law :) be preceded by a lowpass
filter. Try recording sine waves to see if yours are working.

Don't do it at anything higher than -10 db though, audio equipment rarely
is designed for full-volume 20KHz signals!

Cheers,

Bob

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.