Precision Interface Electronics, Inc., better known as PIE, is a manufacturer of a full line of High Quality, State of the Art, Car Audio Installation Accessories. The industry leader in the development & production of Digital Protocol CD Converters and Digital Auxiliary Input Converters. Our commitment is to provide the highest quality accessories & deliver leading edge digital solutions for total integration of CD Changers, DVD, VCP, MP3, Game Systems and Satellite Radio into today's vehicles.