http://www.piclist.com/techref/microchip/math/filter.htm
http://www.piclist.com/techref/microchip/fft/picspect.htm

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James Newton (PICList Admin #3)
mailto:jamesnewton@piclist.com 1-619-652-0593
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-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Douglas Butler
Sent: Tuesday, June 26, 2001 08:37
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC]: A/D spectrum analyzer


If he were asking for realtime digital filtering I would agree, but he
is only asking for a spectrum analyzer.  He can digitize a chunk, then
chew on it for a while before outputting the result and grabbing another
chunk.  I don't have an answer for him, but somewhere there must be some
FFT code for a PIC.

Sherpa Doug

>This is going to sound odd, but this sort of thing is usually best left
with
>analog electronics. You CAN do it digitally but the amount of hardware
>(and/or software) needed to accomplish the same thing a mess of op amps and
>passive components can do is simply overkill. Unless of couse you NEED to
do
>it digitally, in which case a PIC could not do it alone in real time, you
>would need something like a DSP to do it. TTYL
>
>-----Original Message-----
>From: pic microcontroller discussion list
>[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Joe Denehan
>Sent: Tuesday, June 26, 2001 09:48
>To: PICLIST@MITVMA.MIT.EDU
>Subject: A/D spectrum analyzer
>
>
>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.

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