I would like to be able to preform a DWT and filter out everything except for 2^0 and then take that back into the time domain. Does anyone have any suggestions. I am using wmtsa to try and do this. -- Stephen Sefick Let's not spend our time and resources thinking about things that are so little or so large that all they really do for us is puff us up and make us feel like gods. We are mammals, and have not exhausted the annoying little problems of being mammals. -K. Mullis