Found a few more DSP info links. http://www.dsptutor.freeuk.com/ http://www.analog.com/technology/dsp/training/ Down load the whole free dspguide book in one go in ZIP file format. http://www.analog.com/technology/dsp/training/materials/dsp_book_index.html Regards Eelco -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads