@MaTTeR, It's OK, no problem at all ;) @tiki4, Hi, nice to see you reply my post, I think we have the same problem ;) Vorbis 5.1 still not working without ChannelDownmix filter. I'm still waiting the next Creative's driver update, but I dunno when :( I hope the release of Audigy 2 will make new progress on the driver development ;)