erm not exactly, ogg has slightly better quality than wma, a 64kbit ogg is about the same as a 96kbit wma and a 128kbit mp3. also converting from one format to another will always decrease quality. ogg is a very good format far better than mp3 and wma imo, and its free for developers to use no royalites its fairly new which is why you may not have heard of it b4.