Vista and DVB-T HDTV audio problem

[MixMan]

I have probem getting audio to work on Windows Vista with Twinhn DVB-T and HDTV broadcast on SVT-HD channel.
I have tried almost every audio codec, but I get no sound on the HDTV transmissions.
Regular DVB-T broadcasts on Vista works fine.
On a Windows XP PC, the audio to work with HDTV transmissions.

So why is Vista giving me headace?
Does anyone have any experience and can give any tips?

[sub]

I'm pretty sure it'll just come down to the audio decoders you have installed. Maybe try installing AC3Filter.

[BekKen]

Yes, it works with AC3Filter (1.46) but I MUST unregister other audio codecs in my system (InterVideo Audio Decoder, ffdshow Audio Decoder, CyberLink Audio Decoder(Twinhan). I have set <PreferredAudioH264Decoder>AC3Filter</PreferredAudioH264Decoder> but it behaves like it's set to "System Default" and the merrit kicks in.

[BekKen]

Hmm.. I did some more testings. It seems like I have to select the same codec for SD TV and HD TV channels, then I don't have to unregister other audio codecs in my system (using a twinhan mantis/firedtv DVB-T device);

Code:

<PreferredAudioDecoder>AC3Filter</PreferredAudioDecoder>
<PreferredH264AudioDecoder>AC3Filter</PreferredH264AudioDecoder>

If I use below I won't get any audio of the H.264 channel and the LastGraph shows that it mounts InterVideo Audio Decoder and not AC3Filter when watching a H.264 channel.

Code:

<PreferredAudioDecoder>InterVideo Audio Decoder</PreferredAudioDecoder>
<PreferredH264AudioDecoder>AC3Filter</PreferredH264AudioDecoder>

So, well I don't know I'm just guessing, it seems like the construction of graph is made i different ways while watching MPEG2 or H264 channels.

PS! This is for GBPVR.EXE running on Vista, not PVRX2.