Since the ADPCM code can compact a 16 bits number into a 4 bits one (a 4:1 reduction), would be possible to pack a 8 bits number into 2 bits? Friendly Regards Octavio Nogueira =================================================== nogueira@propic2.com ICQ# 19841898 ProPic tools - low cost PIC programmer and emulator http://www.propic2.com ===================================================