I used Foobar2000 for years in order to keep using OzoneMP after Winamp had fallen off the wagon. Based on what I remember of the software license for plugins (modified BSD with a no reverse engineering clause added if I recall correctly), it seemed clear that the devs felt that there was some secret property to their implementation that they wanted to protect. It wasn't obvious to me what that was, though, beyond maybe replaygain or floating point audio. Was there something specific? Does DeaDBeeF player also provide this alleged advantage?