I appreciate the help on my previous FFT posting. I thought I'd mention the existance of some code at http://www.archelon.com/fft.html . I'm not sure if this would be appropriate for my microcontroller (Cygnal C8051F005). It looks like there is a noise generating routine that wouldn't be needed "Oscar()." Any comments would be appreciated. My application requires a 32 point DFT with a 10 Hz sampling rate.