You should plan on processing data at about 3 to 4 times the highest frequency you'll be working with. (Example: For 10KHz signal bandwidth use 30KHz to 40KHz data sample rate.) Distortion will be significant with only 8 bits of resolution. Dynamic range (volume range) will also be very limited with only 8 bits of resolution. I highly suggest you move to a fast 16-bit architecture for this audio application. ______________________________ Reply Separator _________________________________ Subject: FFT width PICs Author: pic microcontroller discussion list at smtp Date: 1/28/97 4:10 PM Has anyone tried to implement FFT width PIC? I'm tryng to do some guitar effects and i don't want to use a DSP (to expensive). At first glance, the worst problem is the memory. Any ideas ? Thanks, Antonio Almeida