> I would like to use a pic to function as an Audio Spectrum Analyzer, does
> anyone know what Pic I could use or where I could find more info.

What is your highest frequency, 20KHz?  Does it need to be real time, or can
you sample a snapshot of the audio signal and do post processing on it?
Does all the signal need to be sampled, or only occasionally?

If it needs to be real time or you are expecting it to keep up with a
continuous "audio" stream of reasonable bandwith, then a PIC isn't going to
do it.  You will need a DSP.  Note that Microchip is coming out with the new
dsPIC line, which is PIC-flavored DSPs.

At best you can expect a PIC to sample a chunk of audio, go "off line" while
is runs an FFT to find the frequencies in the chunk, output those somehow,
then do the next chunk.  PICs and other general purpose microcontrollers are
not well suited to this kind of task.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads