> > I think you meant put the resistor between the output and inverting input. > David... > Oops! Right you are! Audio just sounds wonderful after going through a schmitt trigger! Harold -- FCC Rules Online at http://www.hallikainen.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics