crayola@optonline.net wrote:
> I am not sure why I would choose either one or the
> other but based on what I understand, 8 bit would be more 
> then enough for sampling the audio signal, since I am only 
> updating the servo every 20ms, and the PIC can sample at 
> a much higher rate it appears. An average amplitude over 
> that 20 ms period (with many samples) would be great to 
> calculate and give the most accurate result, but one sample 
> of the amplitude every 20 ms is probably good enough for 
> this purpose. 

You could do the averaging using analogue components, which would 
probably simplify the PIC side of things a fair bit.  Have a search for 
VU meter circuits, that'll give you a rough idea of the sort of thing.

Hmm, with a suitable voltage to pulse-width converter circuit you could 
probably eliminate the PIC entirely...

Optimal solution would depend on whether you find software or analogue 
electronics more scary ;)


kim.
_______________________________________________
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist