There is an implementation of Vorbis decoder written in haXe and compiling to an SWF file playable in Flash 10 now available. It's an initial release and it could use some more general testing and possibly hacking for even better performance. Links: http://lists.xiph.org/pipermail/vorbis-dev/2008-October/019584.html http://barelyfocused.net/blog/2008/10/03/flash-vorbis-player/