Thanks for the quick reply.
I have a VGN-FZ180E/B US model and I do have an HDMI output. This system was of course installed with Vista, and I now have it as a dual boot system and am trying to fix this XP HDMI audio problem. I do have normal audio. When I go into the Sounds and Audio Devices (under Control Panel) and to the Audio tab... the default Sound playback device is SigmaTel Audio (my only choice)... if I hit the Advanced button it brings up the types of speakers but no choice for HDMI out.
I have just uninstalled KB835221 and the my Sigmatel sound driver and have KB888111 and the Audio.RAR files installed now from a post here....
Sony VAIO VGN-AR605E downgrade to XP - driver help!
I know I don't have a AR model but there seems to be a lot of common drivers among Sony computers......
I am using laptops2go 169.28 modded driver along with their special modded INF such that I can get the brightness buttons working... this may have an effect but I don't think so.
Anyway, the SigmaTel driver now listed in my Add/Remove programs is the same as before and the sound over HDMI issue is not any better.
The instructions you sent are for Vista and I don't have any problems their... just in XP....
Any help would be great!