Me again. I have a lead on a possible commercial application of Magic Sine waves a s I understand them. Does anyone know where I can get information on them ?? I realize that information of this type is not free. Correct me if I'm barking up the wrong tree. A company needs to vary the speed of some AC motors. Toshiba says that thier controller will not work in this situation. Long cable run and high voltage. They said the " Harmonics " would not allow thier controller to work. If I understand Magic Sine Waves, using them can eliminate most of the harmonics thus allowing the control of the motors. The company is paying DEARLY for some controllers now.. Any info is greatly appreciated. ---------------------- James and Iliana Austin Texas Automotive Technician Electronics Hobbyist Software Engineer ----------------------