Lou> > A guy fed a bright LED with a microcontroller generated reference Lou> > frequency and used the stroboscobe effect to visually tune the Lou> > strings without making noise - nice ! Lou> Oh man, I've gotta try it! Mike> Must have to darken the room to tune?? Anyone have any ideas, Mike> helpful hints to get this to work? Real men use xenon flash tubes. David -- Their address sums up their attitude: One Microsoft Way http://www.rt66.com/dthomas/